TOTOLINK
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Hardcoded root credentials in TOTOLINK X5000R firmware V9.1.0cu.2415_B20250515 allow unauthenticated remote attackers to gain full administrative control, leading to complete compromise of confidentiality, integrity, and availability. The issue requires network reachability to an authentication service (such as Telnet, SSH, or the web management interface) that accepts the static credential, which is a trivial condition once that service is exposed; however, on typical SOHO deployments the management interface is bound to the LAN, so internet-based exploitation necessitates WAN exposure of the admin service. No public exploit code or confirmed active exploitation has been identified at the time of analysis, and the EPSS score is low (0.19%, 9th percentile).
Buffer overflow in TOTOLINK A3002MU router firmware version Hh-B20211125.1046 allows authenticated remote attackers to corrupt memory and potentially execute arbitrary code by supplying an oversized value to the `service_type` argument of the `formPortFw` CGI handler in the boa embedded web server. The vulnerability is reachable over the network and a proof-of-concept exploit has been publicly published on GitHub. No vendor-released patch has been confirmed at time of analysis.
Stack-based buffer overflow in the Totolink A3002MU router's boa HTTP server allows a network-adjacent authenticated attacker to overwrite memory via an oversized `submit-url` argument submitted to the `formNewSchedule` handler at `/boafrm/formNewSchedule`, likely yielding arbitrary code execution on the device. The affected firmware version is Hh-B20211125.1046. A public proof-of-concept exploit exists on GitHub, raising the realistic exploitation probability for devices reachable from the network with default or known credentials. No vendor patch has been identified at time of analysis.
Buffer overflow in TOTOLINK CP450 4.1.0's web CGI handler allows low-privileged remote attackers to corrupt memory and likely execute arbitrary code by supplying an oversized value to the `topicurl` argument in `/cgi-bin/cstecgi.cgi`. The CVSS 4.0 threat metric E:P confirms proof-of-concept exploit code exists, elevating this beyond a theoretical concern. No vendor patch or advisory has been published, leaving affected devices exposed with only compensating controls available.
Incorrect access control in the recvIndirectMeshInfo function of the TOTOLINK T6 router (firmware 4.1.5cu.748_B20211015) lets remote unauthenticated attackers insert or replace mesh neighbor records by sending a crafted MQTT message to the cs_broker component. The CVSS 9.8 rating reflects an unauthenticated network-facing vector, but the primary real impact is integrity (poisoning of the mesh neighbor table), with no confidentiality read and only indirect availability effect. No public exploit is identified at time of analysis and EPSS is low (0.18%, 7th percentile).
Unauthenticated state tampering in the TOTOLINK T6 router (firmware 4.1.5cu.748_B20211015) lets remote attackers overwrite the mesh slave-IP inventory by publishing a crafted MQTT message to the cs_broker component, which performs no access control on the updateSlaveIpList function. Any attacker able to reach the MQTT broker can corrupt the router's internal record of mesh slave device addresses, disrupting mesh coordination. No public exploit has been identified and EPSS is low (0.17%), but the flaw is unauthenticated and MITRE-reported.
Stack-based buffer overflow in TOTOLINK NR1800X firmware 9.1.0u.6681_B20230703 enables remote code execution through the device's web management CGI interface. The setUploadSetting handler fails to validate the length of the FileName parameter before copying it onto the stack, allowing an attacker with low-privilege access to overwrite control data and execute arbitrary code on the router. A public proof-of-concept has been disclosed on GitHub, materially increasing exploitation risk even in the absence of a confirmed vendor patch.
Unauthenticated wireless-network reconfiguration in the TOTOLINK T6 router (firmware 4.1.5cu.748_B20211015) lets remote attackers alter or disable Wi-Fi settings by sending a crafted POST request to the setWiFiEasyCfg handler in /cgi-bin/cstecgi.cgi, which performs no access-control check. Any attacker able to reach the device's web interface can degrade or take down wireless connectivity and weaken Wi-Fi security parameters. No public exploit identified at time of analysis; EPSS is low (0.18%, 7th percentile) and there is no evidence of active exploitation.
Unauthenticated WAN configuration tampering in the TOTOLINK T6 router (firmware 4.1.5cu.748_B20211015) lets remote attackers alter upstream provisioning and connectivity by POSTing a crafted request to the setWanCfg handler of /cgi-bin/cstecgi.cgi, with no login required. The setWanCfg function performs no access-control check (CWE-284), so an attacker can rewrite WAN/uplink settings - potentially redirecting or severing the device's internet connectivity. No public exploit identified at time of analysis; EPSS is low (0.18%, 7th percentile) and the flaw is not in CISA KEV.
Unauthenticated configuration tampering in TOTOLINK T6 router firmware 4.1.5cu.748_B20211015 lets remote attackers delete Wi-Fi schedule entries by sending a crafted POST request to the /cgi-bin/cstecgi.cgi endpoint. The affected handler (labeled 'FirmwareUpgrade' in the advisory, though the observed effect is removal of Wi-Fi schedule rules) performs no access-control check. No public exploit identified at time of analysis; EPSS is low at 0.18% (7th percentile), consistent with an obscure consumer-router flaw rather than one under broad exploitation.
Unauthenticated access-control bypass in the TOTOLINK T6 router (firmware 4.1.5cu.748_B20211015) lets remote attackers delete MAC address filter rules by sending a crafted POST request to the /cgi-bin/cstecgi.cgi endpoint's delMacFilterRules function. Because no authentication is required, an attacker on the network path can silently strip a device-access control layer, potentially allowing previously blocked/rogue devices onto the LAN. No public exploit identified at time of analysis, and the EPSS score is very low (0.16%, 6th percentile) despite the headline 9.8 CVSS.
Unauthenticated configuration tampering in the TOTOLINK T6 router (firmware 4.1.5cu.748_B20211015) lets remote attackers invoke the setWiFiMeshName handler via a crafted POST to /cgi-bin/cstecgi.cgi with no credentials, renaming mesh network entries. The setter enforces no access control (CWE-284), so any host that can reach the web management interface can alter mesh labels. No public exploit is identified at time of analysis and EPSS is low (0.18%), consistent with a low-value config write rather than a device-takeover primitive.
Memory corruption in TOTOLINK A720R router firmware 4.1.5cu.630_B20250509 allows authenticated remote attackers to trigger a buffer overflow in the MAC filtering subsystem, with potential for arbitrary code execution. The vulnerable path is the `setMacFilterRules` function within `cstecgi.cgi`, exploitable by sending a crafted `desc` argument over the network. A public proof-of-concept is available on GitHub; no CISA KEV listing exists at time of analysis, but the combination of network reachability and published exploit code meaningfully elevates real-world risk.
Unauthenticated network topology and interface configuration disclosure in TOTOLINK T6 firmware 4.1.5cu.748_B20211015 allows any attacker with access to the device's web management interface to retrieve sensitive network layout data without credentials. The getNetInfoCfg function in /cgi-bin/cstecgi.cgi enforces no access control, so a single crafted POST request returns interface and topology details that support downstream reconnaissance and targeted follow-on attacks. No public exploit code is confirmed and EPSS sits at 0.18% (7th percentile), but SOHO routers are frequently internet-exposed with factory defaults intact, elevating practical risk above what EPSS alone implies.
Unauthenticated information disclosure in TOTOLINK T6 firmware 4.1.5cu.748_B20211015 exposes connected client MAC addresses to any remote attacker via the getStationMacByIp CGI function. The /cgi-bin/cstecgi.cgi endpoint processes crafted POST requests without enforcing any access control, returning MAC address data that can enable network reconnaissance and bypass of MAC-based access filtering. No confirmed active exploitation or CISA KEV listing exists, and EPSS probability is negligible at 0.18%, though the fully unauthenticated network vector makes automated scanning trivial.
Unauthenticated information disclosure in TOTOLINK T6 firmware 4.1.5cu.748_B20211015 exposes cloud remote-control (CRPC) status and management URL through the getCrpcCfg function. The /cgi-bin/cstecgi.cgi endpoint processes POST requests without enforcing access control, allowing any network-adjacent attacker to enumerate whether cloud remote management is active and retrieve its target URL. No public exploit has been identified at time of analysis and EPSS sits at the 7th percentile, indicating low current exploitation pressure despite the trivially simple attack vector.
Unauthenticated IPTV and IGMP configuration disclosure in TOTOLINK T6 firmware 4.1.5cu.748_B20211015 allows any network-accessible attacker to retrieve multicast group settings, IPTV server parameters, and IGMP proxy configuration without credentials. The getIptvCfg function in the router's CGI web interface fails to enforce access control, accepting a crafted POST to /cgi-bin/cstecgi.cgi and returning configuration data to unauthenticated callers. No public exploit has been identified at time of analysis, and EPSS at 0.18% (7th percentile) indicates minimal current exploitation interest.
Unauthenticated online client enumeration in TOTOLINK T6 firmware 4.1.5cu.748_B20211015 exposes connected device information to any attacker who can reach the router's HTTP management interface. The getOnlineClient function within the /cgi-bin/cstecgi.cgi CGI dispatcher applies no access control, so a crafted POST request returns the router's live client inventory without credentials. No public exploit has been identified at time of analysis and the EPSS score sits at 0.18% (7th percentile), indicating this is not being exploited at scale - consistent with a batch of researcher-coordinated disclosures across multiple T6 CGI endpoints rather than active threat actor campaigns.
Unauthenticated information disclosure in TOTOLINK T6 firmware 4.1.5cu.748_B20211015 exposes mesh routing table data through the getMeshRoutingTable CGI function. An attacker with network access to the device can send a crafted POST request to /cgi-bin/cstecgi.cgi and retrieve internal mesh routing topology without any credentials. No public exploit has been identified at time of analysis, and EPSS probability is low at 0.18%, though GitHub-hosted CVE coordination repositories suggest researcher awareness and POC development activity.
Unauthenticated access to the getWiFiMeshConfig endpoint on TOTOLINK T6 firmware 4.1.5cu.748_B20211015 exposes mesh network configuration and runtime state to any attacker reachable over the management interface. The CGI handler at /cgi-bin/cstecgi.cgi fails to enforce authentication before executing getWiFiMeshConfig, returning sensitive mesh topology data in response to a single crafted POST request with no credentials. No public exploit or active exploitation has been identified; EPSS at 0.18% (7th percentile) and SSVC exploitation=none confirm low observed exploitation pressure despite the SSVC automatable=yes rating.
Stack-based buffer overflow in the TOTOLINK N600R router (firmware 4.3.0cu.7647_B20210106) lets remote attackers corrupt memory by supplying an oversized Hostname argument to the setSystemConfig function in /cgi-bin/cstecgi.cgi, potentially enabling arbitrary code execution on the device. Publicly available exploit code exists (disclosed via VulDB and a GitHub write-up), though the flaw is not listed in CISA KEV. VulDB scores it CVSS 4.0 9.3 (Critical), reflecting high confidentiality, integrity, and availability impact.
Stack-based buffer overflow in TOTOLINK A800R firmware 4.1.2cu.5137_B20200730 allows remote low-privileged attackers to execute arbitrary code by supplying an oversized 'pin' argument to the setWiFiWpsConfig function exposed via /cgi-bin/cstecgi.cgi in the wps.so component. A public proof-of-concept exploit has been released on GitHub, elevating real-world risk despite the absence of a CISA KEV listing. The CVSS 4.0 score of 8.7 reflects high confidentiality, integrity, and availability impact with low privilege and no user interaction required.
Stack-based buffer overflow in TOTOLINK A800R firmware 4.1.2cu.5137_B20200730 enables remote code execution via the router's firewall URL-filtering CGI endpoint. An attacker holding low-privileged credentials can submit a crafted HTTP request to /cgi-bin/cstecgi.cgi targeting the setUrlFilterRules function; an oversized url argument overflows a fixed stack buffer in firewall.so, allowing arbitrary code execution - likely as root on the embedded MIPS platform. A public proof-of-concept exploit is available on GitHub (ENISA EUVD-2026-58735), and no vendor-released patch has been identified at time of analysis.
Stack-based buffer overflow in TOTOLINK A800R firmware 4.1.2cu.5137_B20200730 allows authenticated remote attackers to achieve likely remote code execution by supplying an oversized urlKeyword argument to the setParentalRules function exposed through /cgi-bin/cstecgi.cgi. The vulnerability resides in the firewall.so component handling parental control URL keyword filtering. A public proof-of-concept exploit has been published on GitHub, elevating practical risk; no vendor patch has been identified at time of analysis.
Stack-based buffer overflow in TOTOLINK A800R firmware 4.1.2cu.5137_B20200730 enables remote low-privileged attackers to achieve arbitrary code execution by submitting an oversized macAddress parameter to the setMacQos QoS firewall function via /cgi-bin/cstecgi.cgi. The CVSS 4.0 score of 8.7 with network attack vector and full CIA impact on the device reflects the severity of exploitation. A public proof-of-concept is confirmed available on GitHub, materially lowering the exploitation barrier; no patch has been identified at time of analysis.
Stack-based buffer overflow in TOTOLINK A800R firmware 4.1.2cu.5137_B20200730 allows network-accessible, low-privilege attackers to potentially execute arbitrary code by sending a crafted request to the UploadCustomModule function in /cgi-bin/cstecgi.cgi. A public proof-of-concept exploit is hosted on GitHub, materially raising practical risk beyond what the absence of a CISA KEV listing might suggest. No vendor patch has been identified, leaving affected deployments reliant on compensating controls.
Stack-based buffer overflow in TOTOLINK A800R firmware 4.1.2cu.5137_B20200730 allows remote low-privileged attackers to execute arbitrary code by supplying an oversized Comment argument to the setIpQosRules function via /cgi-bin/cstecgi.cgi. The flaw resides in firewall.so, the router's QoS firewall shared library, and can result in full device compromise including confidentiality, integrity, and availability loss. A public proof-of-concept exploit is available on GitHub, materially lowering the exploitation barrier; no vendor-released patch has been identified at time of analysis.
Stack-based buffer overflow in the Totolink NR1800X router (firmware 9.1.0u.6279_B20210910) lets remote attackers corrupt memory by supplying an oversized HTTP Host header to the Form_Logout handler at /formLogout.htm, served by the embedded lighttpd web interface. Because the flaw is reachable over the network without authentication and publicly available exploit code exists, it is a strong candidate for opportunistic exploitation despite not yet appearing in CISA KEV. Successful exploitation can crash the device or, given the CWE-121 stack overwrite, potentially achieve code execution on the router.
Least-privilege violation across multiple TOTOLINK SOHO router models (A3000RU, A3100R, A950RG, AC1200T10, CP450, CS185R_T10, EX200 through firmware 20260906) stems from the /etc/boa/boa.conf configuration of the Boa web-server interface, allowing a low-privileged remote actor to gain access or information beyond their intended authorization boundary. The flaw carries CVSS 4.0 base score 7.7 with high attack complexity, and VulDB rates real-world exploitation as difficult. There is no public exploit identified at time of analysis and it is not listed in CISA KEV.
Stack-based buffer overflow in the Totolink EX1200L router's login handler (cgi-bin/cstecgi.cgi) allows remote attackers on the adjacent network to crash the device or execute arbitrary code as root. Confirmed on firmware 9.3.5u.6146_B20201023 with no public exploit identified at time of analysis, but vendor contact attempts by CERT-PL were unsuccessful so no patch is available. CVSS 4.0 of 9.4 reflects unauthenticated exploitation with full impact on both the device and downstream systems.
Stack-based buffer overflow in the Totolink N300RH router (firmware 6.1c.1353_B20190305) allows remote attackers to corrupt memory via the KeyStr argument processed by the setWiFiBasicConfig function in wireless.so, reachable through the Web Management Interface. Publicly available exploit code exists, and the CVSS 4.0 vector indicates network-reachable, unauthenticated exploitation with high impact to confidentiality, integrity, and availability. No CISA KEV listing has been published, so exploitation is not confirmed in the wild despite the public PoC.
OS command injection in the Totolink N300RH router (firmware 6.1c.1353_B20190305) allows remote unauthenticated attackers to execute arbitrary operating system commands by manipulating the admpass argument sent to the setPasswordCfg function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists, and the SSVC framework rates technical impact as total with automatable exploitation, though EPSS remains low at 0.20%. The flaw is reachable over the network without authentication or user interaction, giving an attacker full control of the device.
OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary operating system commands via the 'enable' parameter of the setParentalRules function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists, and while the EPSS score of 0.89% (76th percentile) suggests moderate predicted exploitation likelihood, the network-accessible attack surface on an edge device elevates real-world risk significantly.
OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary operating system commands by manipulating the 'mac' parameter sent to the setAccessDeviceCfg function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists, and SSVC rates the technical impact as total with automatable exploitation, though EPSS remains modest at 0.89% (76th percentile). No CISA KEV listing has been published at time of analysis.
OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary operating system commands by manipulating the admpass parameter sent to the setPasswordCfg function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists and the flaw is reachable over the network without user interaction, though no public exploit identified at time of analysis indicates active in-the-wild abuse via CISA KEV.
OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows unauthenticated remote attackers to execute arbitrary operating system commands via the Comment parameter handled by the setIpQosRules function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists and the SSVC framework rates the technical impact as total with automatable exploitation, though no public exploit identified at time of analysis as actively exploited in the CISA KEV catalog. EPSS sits at 0.89% (76th percentile), suggesting moderate but non-trivial exploitation interest.
Remote OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows unauthenticated attackers to execute arbitrary operating system commands through the setWanCfg function in /cgi-bin/cstecgi.cgi by manipulating the 'enabled' parameter. Publicly available exploit code exists, and with CVSS 4.0 score of 8.9 (network-reachable, low complexity, no privileges required), exposed devices face high risk despite an EPSS score of 0.89% (76th percentile) indicating moderate near-term exploitation probability.
OS command injection in Totolink A8000RU router firmware 7.1cu.643_b20200521 allows remote unauthenticated attackers to execute arbitrary operating system commands by manipulating the FileName argument in the UploadFirmwareFile function of /cgi-bin/cstecgi.cgi. Publicly available exploit code exists per VulDB reporting, and SSVC rates this as automatable with total technical impact, though EPSS remains modest at 0.89% (76th percentile) indicating no broad mass-exploitation campaign yet observed.
Remote OS command injection in TOTOLINK A8000RU router firmware 7.1cu.643_b20200521 allows unauthenticated attackers to execute arbitrary commands via the setOpenVpnCfg function in /cgi-bin/cstecgi.cgi by manipulating the 'enabled' argument. Publicly available exploit code exists, raising the risk of opportunistic attacks against exposed devices, though EPSS scoring (0.89%, 76th percentile) suggests moderate but not yet widespread exploitation. The flaw stems from improper neutralization of OS command elements (CWE-78) in the router's Web Management Interface.
OS command injection in TOTOLINK A8000RU router firmware 7.1cu.643_b20200521 allows remote unauthenticated attackers to execute arbitrary operating system commands by manipulating the FileName parameter in the UploadOpenVpnCert function of /cgi-bin/cstecgi.cgi. Publicly available exploit code exists per VulDB disclosure, and SSVC scoring indicates the flaw is automatable with total technical impact, though EPSS remains modest at 0.89% (76th percentile). The vulnerability is no public exploit identified in CISA KEV, but POC availability combined with network-reachable management interface elevates real-world risk.
OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary commands via the servername parameter of the setOpenVpnCertGenerationCfg function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists (GitHub PoC), and although the EPSS score is modest (0.89%, 76th percentile), the CVSS 4.0 score of 8.9 reflects network-reachable, no-privilege, no-interaction exploitation with high confidentiality, integrity, and availability impact. No CISA KEV listing has been recorded at the time of analysis.
OS command injection in Totolink A8000RU router firmware 7.1cu.643_b20200521 allows remote unauthenticated attackers to execute arbitrary operating system commands by manipulating the 'enable' argument passed to the setL2tpServerCfg function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists (published on GitHub), though EPSS probability remains modest at 0.94% (76th percentile), and the issue is not currently listed in CISA KEV.
OS command injection in Totolink A8000RU router firmware 7.1cu.643_b20200521 allows remote unauthenticated attackers to execute arbitrary operating system commands by manipulating the 'enable' parameter sent to the setQosCfg function of /cgi-bin/cstecgi.cgi in the Web Management Interface. Publicly available exploit code exists per VulDB submission, and the SSVC framework rates technical impact as total with automatable exploitation, though EPSS probability remains modest at 0.89%.
OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows unauthenticated remote attackers to execute arbitrary operating system commands by manipulating the wscDisabled parameter sent to the setWiFiWpsCfg function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists per VulDB disclosure, though EPSS probability remains modest at 0.89% (76th percentile) and the vulnerability is not listed in CISA KEV.
OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary operating system commands by manipulating the 'enable' argument passed to the setMacFilterRules function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists per VulDB, and SSVC categorizes the technical impact as total with automatable exploitation, though EPSS remains modest at 0.89% (76th percentile).
OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary operating system commands by manipulating the bgProtection parameter in the setWiFiAdvancedCfg function of /cgi-bin/cstecgi.cgi. Publicly available exploit code exists per VulDB, and SSVC classifies the issue as automatable with total technical impact, though EPSS exploitation probability remains modest at 0.89% (76th percentile).
OS command injection in the TOTOLINK A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary operating system commands by manipulating the 'enable' parameter passed to the setStaticDhcpRules function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists and SSVC rates this as automatable with total technical impact, though EPSS remains modest at 0.89% (76th percentile). Exploitation requires no authentication or user interaction, making any internet-exposed management interface a high-priority target.
OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary operating system commands by manipulating the firewallType parameter sent to /cgi-bin/cstecgi.cgi. Publicly available exploit code exists, and the SSVC framework rates the technical impact as total with automatable exploitation, though it is not currently listed in CISA KEV. EPSS sits at 0.89% (76th percentile), suggesting moderate but not yet widespread opportunistic exploitation.
OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary operating system commands via the 'enable' parameter of the setRemoteCfg function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists, raising the practical risk despite the device not being listed in CISA KEV; EPSS sits at 0.89% (76th percentile), reflecting moderate predicted exploitation likelihood.
OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary operating system commands by manipulating the 'enable' parameter passed to the setGameSpeedCfg function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists, raising the practical threat despite a modest EPSS score of 0.89% (76th percentile). No active exploitation has been confirmed via CISA KEV at time of analysis.
OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary shell commands by manipulating the 'provider' argument passed to the setDdnsCfg function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists (CVSS 4.0 base 8.9, EPSS 0.89%), and no CISA KEV listing has been issued, but the combination of zero-privilege network exploitation and a working PoC against consumer/SOHO networking gear makes this a high-priority issue for any exposed device.
OS command injection in the TOTOLINK A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary operating system commands by manipulating the 'mode' parameter sent to the setScheduleCfg function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists (published via VulDB and a GitHub PoC), though there is no public exploit identified as actively exploited in the wild and EPSS probability is modest at 0.89%. The flaw resides in the device's Web Management Interface and can be triggered over the network without user interaction, making any internet-exposed device immediately at risk.
OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary operating system commands via the resetFlags parameter handled by the setUpgradeFW function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists, and the SSVC framework classifies exploitation as automatable with total technical impact, though EPSS remains modest at 0.89% (76th percentile).
OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary operating system commands through the setLanguageCfg function in /cgi-bin/cstecgi.cgi. The flaw is triggered by manipulating the lang argument in the Web Management Interface, with publicly available exploit code existing and SSVC classifying the issue as automatable with total technical impact. EPSS sits at 0.89% (76th percentile), indicating moderate but non-trivial exploitation probability.
Remote OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows unauthenticated attackers to execute arbitrary operating system commands by manipulating the 'command' argument in the setTracerouteCfg function of /cgi-bin/cstecgi.cgi. Publicly available exploit code exists, and the CVSS 4.0 vector confirms network-reachable, low-complexity exploitation without authentication or user interaction, though EPSS remains modest at 0.89% (76th percentile) and the issue is not listed in CISA KEV.
OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary operating system commands via the ip parameter handled by the setDiagnosisCfg function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists, and the CVSS 4.0 score of 8.9 reflects high impact across confidentiality, integrity, and availability. EPSS is moderate at 0.89% (76th percentile), and the vulnerability is not currently listed in CISA KEV.
Buffer overflow in Totolink X5000R 9.1.0u.6369_B20230113 router firmware allows authenticated remote attackers to execute arbitrary code or cause denial of service via crafted submit-url parameter to /boafrm/formDdns endpoint. Public exploit code exists (GitHub). CVSS 7.4 indicates high severity but requires authenticated access (PR:L), limiting immediate risk to environments where router credentials are compromised. EPSS data not available; prioritize if router exposed to internet or untrusted networks.
Remote unauthenticated command injection in Totolink A8000RU router firmware 7.1cu.643_b20200521 allows attackers to execute arbitrary OS commands via the 'enable' parameter in the setAppFilterCfg function. Exploitation requires no authentication or user interaction, with a publicly available proof-of-concept exploit published on GitHub. CVSS 8.9 reflects critical impact across confidentiality, integrity, and availability, though EPSS data is unavailable to assess real-world exploitation probability. Not currently listed in CISA KEV, suggesting targeted rather than widespread exploitation at time of analysis.
Remote authenticated attackers can execute arbitrary code on Totolink N300RH 3.2.4-B20220812 routers via buffer overflow in the setMacFilterRules function. Exploitation requires low-privilege authentication to the router's web interface, then sending a crafted POST request with an oversized mac_address parameter to /cgi-bin/cstecgi.cgi. Public exploit code is available (documented on Notion), significantly lowering the barrier to exploitation. EPSS data not available, but the combination of network attack vector, publicly available POC, and vulnerable IoT device suggest moderate real-world risk for internet-exposed routers with default or weak credentials.
Buffer overflow in Totolink N300RH router firmware 3.2.4-B20220812 allows authenticated remote attackers to achieve complete device compromise via crafted DNS parameter in WAN configuration requests. The vulnerability exists in the setWanConfig function within /cgi-bin/cstecgi.cgi POST handler, exploitable by manipulating the priDns argument. Public exploit code is available (CVSS E:P), and CVSS 4.0 score of 7.4 reflects high confidentiality, integrity, and availability impact on the vulnerable device with no cross-scope effects.
Buffer overflow in Totolink N300RH router firmware 3.2.4-B20220812 enables authenticated remote attackers to achieve code execution via crafted FileName parameter to the setUpgradeFW function in /cgi-bin/cstecgi.cgi. Public exploit code is available (documented in Notion). CVSS 7.4 with CVSS 4.0 Exploit maturity 'Proof-of-concept' confirms POC exists. Not listed in CISA KEV, suggesting limited real-world exploitation despite public POC.
Remote unauthenticated attackers can execute arbitrary code on Totolink N300RH routers version 3.2.4-B20220812 by sending crafted Password parameter values to the loginauth authentication function in /cgi-bin/cstecgi.cgi, triggering a stack-based buffer overflow. Exploitation probability is moderate (EPSS score not provided, but publicly available exploit code exists per VulDB reference). This affects consumer-grade wireless routers often deployed in home/SOHO environments with default internet-facing management interfaces, creating significant remote compromise risk despite the device's end-of-life status.
Remote unauthenticated buffer overflow in Totolink WA300 wireless repeater firmware version 5.2cu.7112_B20190227 enables complete device compromise via crafted HTTP POST requests to the login authentication handler. The vulnerability resides in the loginauth function within /cgi-bin/cstecgi.cgi, where insufficient validation of the http_host parameter allows attackers to overflow memory and achieve arbitrary code execution with device privileges. Publicly available exploit code exists (documented via Notion), enabling trivial exploitation with EPSS probability assessment pending but attack complexity rated low (AC:L) with no authentication barrier (PR:N).
Buffer overflow in Totolink WA300 wireless range extender firmware 5.2cu.7112_B20190227 allows authenticated remote attackers to execute arbitrary code or crash the device via crafted File parameter to the UploadCustomModule function in /cgi-bin/cstecgi.cgi. Public proof-of-concept exploit exists (documented in Notion page), enabling low-skill exploitation. EPSS data not available, but low attack complexity (AC:L) and network attack vector (AV:N) combined with public POC indicate elevated real-world risk for affected devices exposed to untrusted authenticated users.
OS command injection in Totolink A8000RU firmware 7.1cu.643_b20200521 allows remote unauthenticated attackers to execute arbitrary system commands via the 'proto' parameter in /cgi-bin/cstecgi.cgi CGI handler. A public proof-of-concept exploit exists on GitHub, significantly lowering the barrier for exploitation. CVSS 8.9 with network vector, low complexity, and no authentication requirements makes this immediately exploitable against internet-facing devices running the vulnerable firmware version.
OS command injection in Totolink A8000RU firmware 7.1cu.643_b20200521 allows remote unauthenticated attackers to execute arbitrary system commands via the User parameter in the setVpnAccountCfg function of /cgi-bin/cstecgi.cgi. Publicly available exploit code exists (GitHub POC), enabling immediate weaponization. CVSS 8.9 with full impact on confidentiality, integrity, and availability. EPSS data unavailable; not currently in CISA KEV, but the combination of network accessibility, no authentication requirement, and public exploit makes this a critical risk for internet-facing devices.
Buffer overflow in Totolink N300RT router firmware 3.4.0-B20250430 allows authenticated remote attackers with high-privilege administrative access to execute arbitrary code via crafted input to the entry_name parameter in /boafrm/formIpQoS. Public exploit code is available on GitHub demonstrating the vulnerability. EPSS data not provided, but the requirement for high-privilege authentication significantly limits real-world exploitation surface to scenarios where administrative credentials are already compromised.
Buffer overflow in Totolink N300RT 3.4.0-B20250430 enables authenticated remote code execution via the WPS configuration handler. An attacker with administrative credentials (PR:H) can send a crafted localPin parameter to /boafrm/formWsc, overflowing a buffer in the is_cmd_string_valid function (libapmib.so) to execute arbitrary code with full system access (VC:H/VI:H/VA:H). Public proof-of-concept exploit code exists on GitHub (xiaohaiyang-ai/TOTOLINK-N300RT-Buffer-Overflow), increasing weaponization risk despite requiring privileged access. EPSS data not available; no CISA KEV listing indicates exploitation not yet widespread in wild attacks.
OS command injection in the TOTOLINK A8000RU router (firmware 7.1cu.643_b20200521) lets remote attackers execute arbitrary shell commands by injecting into the admpass argument of the setLoginPasswordCfg function in /cgi-bin/cstecgi.cgi. The CGI Handler passes attacker-controlled input to a system shell without sanitization, granting full device compromise. Publicly available exploit code exists (disclosed via VulDB/GitHub); no active exploitation is confirmed in CISA KEV, and EPSS is modest at 0.89% (76th percentile).
OS command injection in the TOTOLINK A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary system commands by manipulating the tty_server argument passed to the setAdvancedInfoShow function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists and the CVSS 4.0 vector (AV:N/AC:L/PR:N/UI:N) indicates trivial network-based exploitation yielding full confidentiality, integrity, and availability impact. EPSS is currently low (0.89%, 76th percentile) and there is no public exploit identified as being actively used in the wild per CISA KEV.
OS command injection in the TOTOLINK A8000RU router (firmware 7.1cu.643_b20200521) allows remote attackers to execute arbitrary operating-system commands by manipulating the sys_info argument passed to the setMiniuiHomeInfoShow function of /cgi-bin/cstecgi.cgi. Per the CVSS vector the attack is network-based with no privileges or user interaction required (PR:N/UI:N), and publicly available exploit code exists (published via VulDB/GitHub), though it is not listed in CISA KEV. EPSS is low at 0.89% (76th percentile), suggesting exploitation is plausible but not yet widespread.
OS command injection in the TOTOLINK A8000RU router (firmware 7.1cu.643_b20200521) allows remote attackers to inject arbitrary operating-system commands through the telnet_enabled argument of the setTelnetCfg function in /cgi-bin/cstecgi.cgi. The flaw carries a CVSS 4.0 score of 8.9 with high impact to confidentiality, integrity, and availability, and publicly available exploit code exists, though it is not listed in CISA KEV. EPSS is modest at 0.89% (76th percentile), indicating publicly available exploit code exists but no confirmation of widespread active exploitation.
OS command injection in the TOTOLINK A8000RU router (firmware 7.1cu.643_b20200521) allows remote attackers to execute arbitrary operating-system commands by manipulating the HTTP argument processed by the CsteSystem function in /cgi-bin/cstecgi.cgi. The CVSS 4.0 vector (AV:N/AC:L/PR:N/UI:N) indicates network-reachable, unauthenticated exploitation with high impact to confidentiality, integrity, and availability. Publicly available exploit code exists and a POC has been disclosed; there is no public exploit identified as actively exploited in the wild (not on CISA KEV), and EPSS is low at 0.89%.
OS command injection in the TOTOLINK A8000RU router (firmware 7.1cu.643_b20200521) lets remote, unauthenticated attackers execute arbitrary shell commands by manipulating the 'mode' parameter passed to the setWiFiAclRules function in the /cgi-bin/cstecgi.cgi CGI handler. Publicly available exploit code exists (VulDB) and SSVC rates it automatable with total technical impact, though EPSS remains modest at 0.89% (76th percentile) and it is not listed in CISA KEV. With CVSS 4.0 of 8.9 and no authentication required, any attacker reaching the device's web interface can gain full control.
OS command injection in the TOTOLINK A8000RU router (firmware 7.1cu.643_b20200521) lets remote unauthenticated attackers execute arbitrary system commands by manipulating the 'tz' parameter of the setNtpCfg function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists (published via VulDB), and the CVSS 4.0 vector (AV:N/AC:L/PR:N/UI:N, total impact) reflects unauthenticated network reachability with full compromise, though EPSS remains modest at 0.89%. This is no public exploit identified as actively exploited - there is no CISA KEV listing at time of analysis.
OS command injection in the TOTOLINK A8000RU router (firmware 7.1cu.643_b20200521) allows remote attackers to execute arbitrary operating-system commands by manipulating the sambaEnabled argument passed to the setStorageCfg function in /cgi-bin/cstecgi.cgi. The CVSS 4.0 vector indicates network-reachable, unauthenticated exploitation (AV:N/PR:N/UI:N) with total impact on confidentiality, integrity, and availability. Publicly available exploit code exists (VulDB), though EPSS remains modest at 0.89% (76th percentile) and it is not listed in CISA KEV.
OS command injection in the TOTOLINK A8000RU router (firmware 7.1cu.643_b20200521) lets remote attackers inject arbitrary operating-system commands through the wanIdx argument of the setDmzCfg handler in /cgi-bin/cstecgi.cgi. The CGI Handler passes attacker-controlled input into a shell context without sanitization, yielding full command execution on the device. Publicly available exploit code exists and the SSVC framework rates technical impact as total and the attack as automatable, though it is not listed in CISA KEV and EPSS remains modest at 0.89%.
OS command injection in Totolink A8000RU 7.1cu.643_b20200521 allows remote unauthenticated attackers to execute arbitrary system commands via the 'merge' parameter in the setWiFiEasyCfg function of /cgi-bin/cstecgi.cgi. Publicly available exploit code exists on GitHub (Litengzheng/vuldb_new2), enabling trivial exploitation against internet-facing devices. CVSS 8.9 reflects network attack vector with no authentication required (AV:N/PR:N), and EPSS data suggests moderate real-world exploitation probability given the POC availability and low attack complexity.
OS command injection in Totolink A8000RU 7.1cu.643_b20200521 allows remote unauthenticated attackers to execute arbitrary system commands via crafted addrPrefixLen parameter to the setIpv6LanCfg function in /cgi-bin/cstecgi.cgi. CVSS 8.9 (High) with CVSS:4.0 vector indicating network-accessible, low-complexity attack requiring no privileges or user interaction. Publicly available exploit code exists (GitHub POC), enabling weaponization by threat actors. Not currently listed in CISA KEV, suggesting limited observed exploitation despite public disclosure and high severity scoring.
OS command injection in Totolink A8000RU router firmware 7.1cu.643_b20200521 allows remote unauthenticated attackers to execute arbitrary system commands via the setIptvCfg parameter in /cgi-bin/cstecgi.cgi. CVSS 8.9 (Critical) with network attack vector and no authentication required. Public exploit code available on GitHub since disclosure, significantly lowering exploitation barrier for attackers targeting internet-facing consumer routers. No vendor patch identified for this end-of-life device at time of analysis.
OS command injection in Totolink A8000RU firmware 7.1cu.643_b20200521 enables remote unauthenticated attackers to execute arbitrary system commands via the pptpPassThru parameter in the setVpnPassCfg function. Public exploit code exists on GitHub, dramatically lowering the barrier to exploitation. CVSS v4.0 base score of 8.9 reflects network attack vector, low complexity, and no authentication requirements, with high impact to confidentiality, integrity, and availability of the vulnerable device.
Command injection in Totolink A7100RU router firmware 7.4cu.2313_b20191024 allows unauthenticated remote attackers to execute arbitrary operating system commands via the admpass parameter in the setPasswordCfg function of /cgi-bin/cstecgi.cgi. Public exploit code exists (CVSS 8.9, EPSS 0.89% / 76th percentile, SSVC: POC/automatable/total impact). Not listed in CISA KEV; real-world exploitation status unconfirmed beyond POC publication.
Stack-based buffer overflow in Totolink A3002MU router firmware B20211125.1046 allows authenticated remote attackers to execute arbitrary code via crafted 'wan-url' parameter in /boafrm/formWlanSetup endpoint. Publicly available exploit code exists (PoC on GitHub). EPSS score of 0.08% (23rd percentile) indicates low observed exploitation probability despite public exploit, likely due to authentication requirement (PR:L) and narrow attack surface of legacy consumer router product.
Stack-based buffer overflow in TOTOLINK A7000R router (firmware ≤9.1.0u.6115) allows authenticated remote attackers to achieve complete system compromise via the setWiFiEasyGuestCfg CGI function. The vulnerability exists in /cgi-bin/cstecgi.cgi where unsanitized input to the ssid5g parameter triggers memory corruption, enabling arbitrary code execution with device privileges. Publicly available exploit code exists, significantly lowering the barrier to exploitation for authenticated attackers on the network.
Buffer overflow in Totolink A800R router firmware 4.1.2cu.5137_B20200730 allows authenticated remote attackers to achieve arbitrary code execution with high confidentiality, integrity, and availability impact. The vulnerability resides in the setAppEasyWizardConfig function within /lib/cste_modules/app.so, triggered by malicious input to the apcliSsid parameter. Public exploit code is available on GitHub (CVSS 7.4, CVSS:4.0). Authentication is required (PR:L), but attack complexity is low (AC:L)
OS command injection in Totolink A7100RU router firmware 7.4cu.2313_b20191024 allows unauthenticated remote attackers to execute arbitrary system commands via the Comment parameter in the setIpQosRules function exposed through /cgi-bin/cstecgi.cgi. CVSS 8.9 (Critical) with network attack vector, low complexity, and no privileges required. Publicly available exploit code exists (GitHub POC published), significantly lowering the exploitation barrier for opportunistic attackers targeting vulnerable devices.
OS command injection in Totolink A7100RU router firmware 7.4cu.2313 allows unauthenticated remote attackers to execute arbitrary system commands via the pppoeServiceName parameter in the setWanCfg function of /cgi-bin/cstecgi.cgi. Publicly available exploit code exists (GitHub POC), enabling trivial remote compromise with high impact on confidentiality, integrity, and availability. CVSS 8.9 (Critical) with network attack vector, low complexity, and no authentication required. SOHO router vulnerabilities like this are commonly targeted for botnet recruitment and lateral network movement.
OS command injection in Totolink A7100RU router firmware 7.4cu.2313_b20191024 allows unauthenticated remote attackers to execute arbitrary system commands with router privileges via crafted wizard parameters to the setWizardCfg CGI function. Publicly available exploit code exists (GitHub POC), significantly lowering the barrier to exploitation. The CVSS 4.0 score of 8.9 reflects network-accessible attack vector with no authentication or user interaction required, enabling full compromise of router confidentiality, integrity, and availability.
OS command injection in Totolink A7100RU router firmware 7.4cu.2313_b20191024 allows unauthenticated remote attackers to execute arbitrary system commands via crafted FileName parameter to the UploadFirmwareFile function in /cgi-bin/cstecgi.cgi. CVSS 9.8 (Critical) with network attack vector, no privileges required, and complete system compromise possible. Publicly available exploit code exists (GitHub POC). No vendor-released patch identified at time of analysis. EPSS data not provided, but combination of critical CVSS, unauthenticated remote vector, and public exploit indicates high real-world exploitation risk.
OS command injection in Totolink A7100RU firmware 7.4cu.2313_b20191024 allows unauthenticated remote attackers to execute arbitrary system commands via the FileName parameter in UploadOpenVpnCert function of /cgi-bin/cstecgi.cgi. Publicly available exploit code exists (POC on GitHub), enabling trivial exploitation with no authentication required. CVSS 9.8 (Critical) reflects network-based attack vector with low complexity and no privileges needed. No vendor-released patch identified at time of analysis.
Hardcoded root credentials in TOTOLINK X5000R firmware V9.1.0cu.2415_B20250515 allow unauthenticated remote attackers to gain full administrative control, leading to complete compromise of confidentiality, integrity, and availability. The issue requires network reachability to an authentication service (such as Telnet, SSH, or the web management interface) that accepts the static credential, which is a trivial condition once that service is exposed; however, on typical SOHO deployments the management interface is bound to the LAN, so internet-based exploitation necessitates WAN exposure of the admin service. No public exploit code or confirmed active exploitation has been identified at the time of analysis, and the EPSS score is low (0.19%, 9th percentile).
Buffer overflow in TOTOLINK A3002MU router firmware version Hh-B20211125.1046 allows authenticated remote attackers to corrupt memory and potentially execute arbitrary code by supplying an oversized value to the `service_type` argument of the `formPortFw` CGI handler in the boa embedded web server. The vulnerability is reachable over the network and a proof-of-concept exploit has been publicly published on GitHub. No vendor-released patch has been confirmed at time of analysis.
Stack-based buffer overflow in the Totolink A3002MU router's boa HTTP server allows a network-adjacent authenticated attacker to overwrite memory via an oversized `submit-url` argument submitted to the `formNewSchedule` handler at `/boafrm/formNewSchedule`, likely yielding arbitrary code execution on the device. The affected firmware version is Hh-B20211125.1046. A public proof-of-concept exploit exists on GitHub, raising the realistic exploitation probability for devices reachable from the network with default or known credentials. No vendor patch has been identified at time of analysis.
Buffer overflow in TOTOLINK CP450 4.1.0's web CGI handler allows low-privileged remote attackers to corrupt memory and likely execute arbitrary code by supplying an oversized value to the `topicurl` argument in `/cgi-bin/cstecgi.cgi`. The CVSS 4.0 threat metric E:P confirms proof-of-concept exploit code exists, elevating this beyond a theoretical concern. No vendor patch or advisory has been published, leaving affected devices exposed with only compensating controls available.
Incorrect access control in the recvIndirectMeshInfo function of the TOTOLINK T6 router (firmware 4.1.5cu.748_B20211015) lets remote unauthenticated attackers insert or replace mesh neighbor records by sending a crafted MQTT message to the cs_broker component. The CVSS 9.8 rating reflects an unauthenticated network-facing vector, but the primary real impact is integrity (poisoning of the mesh neighbor table), with no confidentiality read and only indirect availability effect. No public exploit is identified at time of analysis and EPSS is low (0.18%, 7th percentile).
Unauthenticated state tampering in the TOTOLINK T6 router (firmware 4.1.5cu.748_B20211015) lets remote attackers overwrite the mesh slave-IP inventory by publishing a crafted MQTT message to the cs_broker component, which performs no access control on the updateSlaveIpList function. Any attacker able to reach the MQTT broker can corrupt the router's internal record of mesh slave device addresses, disrupting mesh coordination. No public exploit has been identified and EPSS is low (0.17%), but the flaw is unauthenticated and MITRE-reported.
Stack-based buffer overflow in TOTOLINK NR1800X firmware 9.1.0u.6681_B20230703 enables remote code execution through the device's web management CGI interface. The setUploadSetting handler fails to validate the length of the FileName parameter before copying it onto the stack, allowing an attacker with low-privilege access to overwrite control data and execute arbitrary code on the router. A public proof-of-concept has been disclosed on GitHub, materially increasing exploitation risk even in the absence of a confirmed vendor patch.
Unauthenticated wireless-network reconfiguration in the TOTOLINK T6 router (firmware 4.1.5cu.748_B20211015) lets remote attackers alter or disable Wi-Fi settings by sending a crafted POST request to the setWiFiEasyCfg handler in /cgi-bin/cstecgi.cgi, which performs no access-control check. Any attacker able to reach the device's web interface can degrade or take down wireless connectivity and weaken Wi-Fi security parameters. No public exploit identified at time of analysis; EPSS is low (0.18%, 7th percentile) and there is no evidence of active exploitation.
Unauthenticated WAN configuration tampering in the TOTOLINK T6 router (firmware 4.1.5cu.748_B20211015) lets remote attackers alter upstream provisioning and connectivity by POSTing a crafted request to the setWanCfg handler of /cgi-bin/cstecgi.cgi, with no login required. The setWanCfg function performs no access-control check (CWE-284), so an attacker can rewrite WAN/uplink settings - potentially redirecting or severing the device's internet connectivity. No public exploit identified at time of analysis; EPSS is low (0.18%, 7th percentile) and the flaw is not in CISA KEV.
Unauthenticated configuration tampering in TOTOLINK T6 router firmware 4.1.5cu.748_B20211015 lets remote attackers delete Wi-Fi schedule entries by sending a crafted POST request to the /cgi-bin/cstecgi.cgi endpoint. The affected handler (labeled 'FirmwareUpgrade' in the advisory, though the observed effect is removal of Wi-Fi schedule rules) performs no access-control check. No public exploit identified at time of analysis; EPSS is low at 0.18% (7th percentile), consistent with an obscure consumer-router flaw rather than one under broad exploitation.
Unauthenticated access-control bypass in the TOTOLINK T6 router (firmware 4.1.5cu.748_B20211015) lets remote attackers delete MAC address filter rules by sending a crafted POST request to the /cgi-bin/cstecgi.cgi endpoint's delMacFilterRules function. Because no authentication is required, an attacker on the network path can silently strip a device-access control layer, potentially allowing previously blocked/rogue devices onto the LAN. No public exploit identified at time of analysis, and the EPSS score is very low (0.16%, 6th percentile) despite the headline 9.8 CVSS.
Unauthenticated configuration tampering in the TOTOLINK T6 router (firmware 4.1.5cu.748_B20211015) lets remote attackers invoke the setWiFiMeshName handler via a crafted POST to /cgi-bin/cstecgi.cgi with no credentials, renaming mesh network entries. The setter enforces no access control (CWE-284), so any host that can reach the web management interface can alter mesh labels. No public exploit is identified at time of analysis and EPSS is low (0.18%), consistent with a low-value config write rather than a device-takeover primitive.
Memory corruption in TOTOLINK A720R router firmware 4.1.5cu.630_B20250509 allows authenticated remote attackers to trigger a buffer overflow in the MAC filtering subsystem, with potential for arbitrary code execution. The vulnerable path is the `setMacFilterRules` function within `cstecgi.cgi`, exploitable by sending a crafted `desc` argument over the network. A public proof-of-concept is available on GitHub; no CISA KEV listing exists at time of analysis, but the combination of network reachability and published exploit code meaningfully elevates real-world risk.
Unauthenticated network topology and interface configuration disclosure in TOTOLINK T6 firmware 4.1.5cu.748_B20211015 allows any attacker with access to the device's web management interface to retrieve sensitive network layout data without credentials. The getNetInfoCfg function in /cgi-bin/cstecgi.cgi enforces no access control, so a single crafted POST request returns interface and topology details that support downstream reconnaissance and targeted follow-on attacks. No public exploit code is confirmed and EPSS sits at 0.18% (7th percentile), but SOHO routers are frequently internet-exposed with factory defaults intact, elevating practical risk above what EPSS alone implies.
Unauthenticated information disclosure in TOTOLINK T6 firmware 4.1.5cu.748_B20211015 exposes connected client MAC addresses to any remote attacker via the getStationMacByIp CGI function. The /cgi-bin/cstecgi.cgi endpoint processes crafted POST requests without enforcing any access control, returning MAC address data that can enable network reconnaissance and bypass of MAC-based access filtering. No confirmed active exploitation or CISA KEV listing exists, and EPSS probability is negligible at 0.18%, though the fully unauthenticated network vector makes automated scanning trivial.
Unauthenticated information disclosure in TOTOLINK T6 firmware 4.1.5cu.748_B20211015 exposes cloud remote-control (CRPC) status and management URL through the getCrpcCfg function. The /cgi-bin/cstecgi.cgi endpoint processes POST requests without enforcing access control, allowing any network-adjacent attacker to enumerate whether cloud remote management is active and retrieve its target URL. No public exploit has been identified at time of analysis and EPSS sits at the 7th percentile, indicating low current exploitation pressure despite the trivially simple attack vector.
Unauthenticated IPTV and IGMP configuration disclosure in TOTOLINK T6 firmware 4.1.5cu.748_B20211015 allows any network-accessible attacker to retrieve multicast group settings, IPTV server parameters, and IGMP proxy configuration without credentials. The getIptvCfg function in the router's CGI web interface fails to enforce access control, accepting a crafted POST to /cgi-bin/cstecgi.cgi and returning configuration data to unauthenticated callers. No public exploit has been identified at time of analysis, and EPSS at 0.18% (7th percentile) indicates minimal current exploitation interest.
Unauthenticated online client enumeration in TOTOLINK T6 firmware 4.1.5cu.748_B20211015 exposes connected device information to any attacker who can reach the router's HTTP management interface. The getOnlineClient function within the /cgi-bin/cstecgi.cgi CGI dispatcher applies no access control, so a crafted POST request returns the router's live client inventory without credentials. No public exploit has been identified at time of analysis and the EPSS score sits at 0.18% (7th percentile), indicating this is not being exploited at scale - consistent with a batch of researcher-coordinated disclosures across multiple T6 CGI endpoints rather than active threat actor campaigns.
Unauthenticated information disclosure in TOTOLINK T6 firmware 4.1.5cu.748_B20211015 exposes mesh routing table data through the getMeshRoutingTable CGI function. An attacker with network access to the device can send a crafted POST request to /cgi-bin/cstecgi.cgi and retrieve internal mesh routing topology without any credentials. No public exploit has been identified at time of analysis, and EPSS probability is low at 0.18%, though GitHub-hosted CVE coordination repositories suggest researcher awareness and POC development activity.
Unauthenticated access to the getWiFiMeshConfig endpoint on TOTOLINK T6 firmware 4.1.5cu.748_B20211015 exposes mesh network configuration and runtime state to any attacker reachable over the management interface. The CGI handler at /cgi-bin/cstecgi.cgi fails to enforce authentication before executing getWiFiMeshConfig, returning sensitive mesh topology data in response to a single crafted POST request with no credentials. No public exploit or active exploitation has been identified; EPSS at 0.18% (7th percentile) and SSVC exploitation=none confirm low observed exploitation pressure despite the SSVC automatable=yes rating.
Stack-based buffer overflow in the TOTOLINK N600R router (firmware 4.3.0cu.7647_B20210106) lets remote attackers corrupt memory by supplying an oversized Hostname argument to the setSystemConfig function in /cgi-bin/cstecgi.cgi, potentially enabling arbitrary code execution on the device. Publicly available exploit code exists (disclosed via VulDB and a GitHub write-up), though the flaw is not listed in CISA KEV. VulDB scores it CVSS 4.0 9.3 (Critical), reflecting high confidentiality, integrity, and availability impact.
Stack-based buffer overflow in TOTOLINK A800R firmware 4.1.2cu.5137_B20200730 allows remote low-privileged attackers to execute arbitrary code by supplying an oversized 'pin' argument to the setWiFiWpsConfig function exposed via /cgi-bin/cstecgi.cgi in the wps.so component. A public proof-of-concept exploit has been released on GitHub, elevating real-world risk despite the absence of a CISA KEV listing. The CVSS 4.0 score of 8.7 reflects high confidentiality, integrity, and availability impact with low privilege and no user interaction required.
Stack-based buffer overflow in TOTOLINK A800R firmware 4.1.2cu.5137_B20200730 enables remote code execution via the router's firewall URL-filtering CGI endpoint. An attacker holding low-privileged credentials can submit a crafted HTTP request to /cgi-bin/cstecgi.cgi targeting the setUrlFilterRules function; an oversized url argument overflows a fixed stack buffer in firewall.so, allowing arbitrary code execution - likely as root on the embedded MIPS platform. A public proof-of-concept exploit is available on GitHub (ENISA EUVD-2026-58735), and no vendor-released patch has been identified at time of analysis.
Stack-based buffer overflow in TOTOLINK A800R firmware 4.1.2cu.5137_B20200730 allows authenticated remote attackers to achieve likely remote code execution by supplying an oversized urlKeyword argument to the setParentalRules function exposed through /cgi-bin/cstecgi.cgi. The vulnerability resides in the firewall.so component handling parental control URL keyword filtering. A public proof-of-concept exploit has been published on GitHub, elevating practical risk; no vendor patch has been identified at time of analysis.
Stack-based buffer overflow in TOTOLINK A800R firmware 4.1.2cu.5137_B20200730 enables remote low-privileged attackers to achieve arbitrary code execution by submitting an oversized macAddress parameter to the setMacQos QoS firewall function via /cgi-bin/cstecgi.cgi. The CVSS 4.0 score of 8.7 with network attack vector and full CIA impact on the device reflects the severity of exploitation. A public proof-of-concept is confirmed available on GitHub, materially lowering the exploitation barrier; no patch has been identified at time of analysis.
Stack-based buffer overflow in TOTOLINK A800R firmware 4.1.2cu.5137_B20200730 allows network-accessible, low-privilege attackers to potentially execute arbitrary code by sending a crafted request to the UploadCustomModule function in /cgi-bin/cstecgi.cgi. A public proof-of-concept exploit is hosted on GitHub, materially raising practical risk beyond what the absence of a CISA KEV listing might suggest. No vendor patch has been identified, leaving affected deployments reliant on compensating controls.
Stack-based buffer overflow in TOTOLINK A800R firmware 4.1.2cu.5137_B20200730 allows remote low-privileged attackers to execute arbitrary code by supplying an oversized Comment argument to the setIpQosRules function via /cgi-bin/cstecgi.cgi. The flaw resides in firewall.so, the router's QoS firewall shared library, and can result in full device compromise including confidentiality, integrity, and availability loss. A public proof-of-concept exploit is available on GitHub, materially lowering the exploitation barrier; no vendor-released patch has been identified at time of analysis.
Stack-based buffer overflow in the Totolink NR1800X router (firmware 9.1.0u.6279_B20210910) lets remote attackers corrupt memory by supplying an oversized HTTP Host header to the Form_Logout handler at /formLogout.htm, served by the embedded lighttpd web interface. Because the flaw is reachable over the network without authentication and publicly available exploit code exists, it is a strong candidate for opportunistic exploitation despite not yet appearing in CISA KEV. Successful exploitation can crash the device or, given the CWE-121 stack overwrite, potentially achieve code execution on the router.
Least-privilege violation across multiple TOTOLINK SOHO router models (A3000RU, A3100R, A950RG, AC1200T10, CP450, CS185R_T10, EX200 through firmware 20260906) stems from the /etc/boa/boa.conf configuration of the Boa web-server interface, allowing a low-privileged remote actor to gain access or information beyond their intended authorization boundary. The flaw carries CVSS 4.0 base score 7.7 with high attack complexity, and VulDB rates real-world exploitation as difficult. There is no public exploit identified at time of analysis and it is not listed in CISA KEV.
Stack-based buffer overflow in the Totolink EX1200L router's login handler (cgi-bin/cstecgi.cgi) allows remote attackers on the adjacent network to crash the device or execute arbitrary code as root. Confirmed on firmware 9.3.5u.6146_B20201023 with no public exploit identified at time of analysis, but vendor contact attempts by CERT-PL were unsuccessful so no patch is available. CVSS 4.0 of 9.4 reflects unauthenticated exploitation with full impact on both the device and downstream systems.
Stack-based buffer overflow in the Totolink N300RH router (firmware 6.1c.1353_B20190305) allows remote attackers to corrupt memory via the KeyStr argument processed by the setWiFiBasicConfig function in wireless.so, reachable through the Web Management Interface. Publicly available exploit code exists, and the CVSS 4.0 vector indicates network-reachable, unauthenticated exploitation with high impact to confidentiality, integrity, and availability. No CISA KEV listing has been published, so exploitation is not confirmed in the wild despite the public PoC.
OS command injection in the Totolink N300RH router (firmware 6.1c.1353_B20190305) allows remote unauthenticated attackers to execute arbitrary operating system commands by manipulating the admpass argument sent to the setPasswordCfg function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists, and the SSVC framework rates technical impact as total with automatable exploitation, though EPSS remains low at 0.20%. The flaw is reachable over the network without authentication or user interaction, giving an attacker full control of the device.
OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary operating system commands via the 'enable' parameter of the setParentalRules function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists, and while the EPSS score of 0.89% (76th percentile) suggests moderate predicted exploitation likelihood, the network-accessible attack surface on an edge device elevates real-world risk significantly.
OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary operating system commands by manipulating the 'mac' parameter sent to the setAccessDeviceCfg function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists, and SSVC rates the technical impact as total with automatable exploitation, though EPSS remains modest at 0.89% (76th percentile). No CISA KEV listing has been published at time of analysis.
OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary operating system commands by manipulating the admpass parameter sent to the setPasswordCfg function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists and the flaw is reachable over the network without user interaction, though no public exploit identified at time of analysis indicates active in-the-wild abuse via CISA KEV.
OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows unauthenticated remote attackers to execute arbitrary operating system commands via the Comment parameter handled by the setIpQosRules function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists and the SSVC framework rates the technical impact as total with automatable exploitation, though no public exploit identified at time of analysis as actively exploited in the CISA KEV catalog. EPSS sits at 0.89% (76th percentile), suggesting moderate but non-trivial exploitation interest.
Remote OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows unauthenticated attackers to execute arbitrary operating system commands through the setWanCfg function in /cgi-bin/cstecgi.cgi by manipulating the 'enabled' parameter. Publicly available exploit code exists, and with CVSS 4.0 score of 8.9 (network-reachable, low complexity, no privileges required), exposed devices face high risk despite an EPSS score of 0.89% (76th percentile) indicating moderate near-term exploitation probability.
OS command injection in Totolink A8000RU router firmware 7.1cu.643_b20200521 allows remote unauthenticated attackers to execute arbitrary operating system commands by manipulating the FileName argument in the UploadFirmwareFile function of /cgi-bin/cstecgi.cgi. Publicly available exploit code exists per VulDB reporting, and SSVC rates this as automatable with total technical impact, though EPSS remains modest at 0.89% (76th percentile) indicating no broad mass-exploitation campaign yet observed.
Remote OS command injection in TOTOLINK A8000RU router firmware 7.1cu.643_b20200521 allows unauthenticated attackers to execute arbitrary commands via the setOpenVpnCfg function in /cgi-bin/cstecgi.cgi by manipulating the 'enabled' argument. Publicly available exploit code exists, raising the risk of opportunistic attacks against exposed devices, though EPSS scoring (0.89%, 76th percentile) suggests moderate but not yet widespread exploitation. The flaw stems from improper neutralization of OS command elements (CWE-78) in the router's Web Management Interface.
OS command injection in TOTOLINK A8000RU router firmware 7.1cu.643_b20200521 allows remote unauthenticated attackers to execute arbitrary operating system commands by manipulating the FileName parameter in the UploadOpenVpnCert function of /cgi-bin/cstecgi.cgi. Publicly available exploit code exists per VulDB disclosure, and SSVC scoring indicates the flaw is automatable with total technical impact, though EPSS remains modest at 0.89% (76th percentile). The vulnerability is no public exploit identified in CISA KEV, but POC availability combined with network-reachable management interface elevates real-world risk.
OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary commands via the servername parameter of the setOpenVpnCertGenerationCfg function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists (GitHub PoC), and although the EPSS score is modest (0.89%, 76th percentile), the CVSS 4.0 score of 8.9 reflects network-reachable, no-privilege, no-interaction exploitation with high confidentiality, integrity, and availability impact. No CISA KEV listing has been recorded at the time of analysis.
OS command injection in Totolink A8000RU router firmware 7.1cu.643_b20200521 allows remote unauthenticated attackers to execute arbitrary operating system commands by manipulating the 'enable' argument passed to the setL2tpServerCfg function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists (published on GitHub), though EPSS probability remains modest at 0.94% (76th percentile), and the issue is not currently listed in CISA KEV.
OS command injection in Totolink A8000RU router firmware 7.1cu.643_b20200521 allows remote unauthenticated attackers to execute arbitrary operating system commands by manipulating the 'enable' parameter sent to the setQosCfg function of /cgi-bin/cstecgi.cgi in the Web Management Interface. Publicly available exploit code exists per VulDB submission, and the SSVC framework rates technical impact as total with automatable exploitation, though EPSS probability remains modest at 0.89%.
OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows unauthenticated remote attackers to execute arbitrary operating system commands by manipulating the wscDisabled parameter sent to the setWiFiWpsCfg function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists per VulDB disclosure, though EPSS probability remains modest at 0.89% (76th percentile) and the vulnerability is not listed in CISA KEV.
OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary operating system commands by manipulating the 'enable' argument passed to the setMacFilterRules function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists per VulDB, and SSVC categorizes the technical impact as total with automatable exploitation, though EPSS remains modest at 0.89% (76th percentile).
OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary operating system commands by manipulating the bgProtection parameter in the setWiFiAdvancedCfg function of /cgi-bin/cstecgi.cgi. Publicly available exploit code exists per VulDB, and SSVC classifies the issue as automatable with total technical impact, though EPSS exploitation probability remains modest at 0.89% (76th percentile).
OS command injection in the TOTOLINK A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary operating system commands by manipulating the 'enable' parameter passed to the setStaticDhcpRules function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists and SSVC rates this as automatable with total technical impact, though EPSS remains modest at 0.89% (76th percentile). Exploitation requires no authentication or user interaction, making any internet-exposed management interface a high-priority target.
OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary operating system commands by manipulating the firewallType parameter sent to /cgi-bin/cstecgi.cgi. Publicly available exploit code exists, and the SSVC framework rates the technical impact as total with automatable exploitation, though it is not currently listed in CISA KEV. EPSS sits at 0.89% (76th percentile), suggesting moderate but not yet widespread opportunistic exploitation.
OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary operating system commands via the 'enable' parameter of the setRemoteCfg function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists, raising the practical risk despite the device not being listed in CISA KEV; EPSS sits at 0.89% (76th percentile), reflecting moderate predicted exploitation likelihood.
OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary operating system commands by manipulating the 'enable' parameter passed to the setGameSpeedCfg function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists, raising the practical threat despite a modest EPSS score of 0.89% (76th percentile). No active exploitation has been confirmed via CISA KEV at time of analysis.
OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary shell commands by manipulating the 'provider' argument passed to the setDdnsCfg function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists (CVSS 4.0 base 8.9, EPSS 0.89%), and no CISA KEV listing has been issued, but the combination of zero-privilege network exploitation and a working PoC against consumer/SOHO networking gear makes this a high-priority issue for any exposed device.
OS command injection in the TOTOLINK A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary operating system commands by manipulating the 'mode' parameter sent to the setScheduleCfg function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists (published via VulDB and a GitHub PoC), though there is no public exploit identified as actively exploited in the wild and EPSS probability is modest at 0.89%. The flaw resides in the device's Web Management Interface and can be triggered over the network without user interaction, making any internet-exposed device immediately at risk.
OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary operating system commands via the resetFlags parameter handled by the setUpgradeFW function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists, and the SSVC framework classifies exploitation as automatable with total technical impact, though EPSS remains modest at 0.89% (76th percentile).
OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary operating system commands through the setLanguageCfg function in /cgi-bin/cstecgi.cgi. The flaw is triggered by manipulating the lang argument in the Web Management Interface, with publicly available exploit code existing and SSVC classifying the issue as automatable with total technical impact. EPSS sits at 0.89% (76th percentile), indicating moderate but non-trivial exploitation probability.
Remote OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows unauthenticated attackers to execute arbitrary operating system commands by manipulating the 'command' argument in the setTracerouteCfg function of /cgi-bin/cstecgi.cgi. Publicly available exploit code exists, and the CVSS 4.0 vector confirms network-reachable, low-complexity exploitation without authentication or user interaction, though EPSS remains modest at 0.89% (76th percentile) and the issue is not listed in CISA KEV.
OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary operating system commands via the ip parameter handled by the setDiagnosisCfg function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists, and the CVSS 4.0 score of 8.9 reflects high impact across confidentiality, integrity, and availability. EPSS is moderate at 0.89% (76th percentile), and the vulnerability is not currently listed in CISA KEV.
Buffer overflow in Totolink X5000R 9.1.0u.6369_B20230113 router firmware allows authenticated remote attackers to execute arbitrary code or cause denial of service via crafted submit-url parameter to /boafrm/formDdns endpoint. Public exploit code exists (GitHub). CVSS 7.4 indicates high severity but requires authenticated access (PR:L), limiting immediate risk to environments where router credentials are compromised. EPSS data not available; prioritize if router exposed to internet or untrusted networks.
Remote unauthenticated command injection in Totolink A8000RU router firmware 7.1cu.643_b20200521 allows attackers to execute arbitrary OS commands via the 'enable' parameter in the setAppFilterCfg function. Exploitation requires no authentication or user interaction, with a publicly available proof-of-concept exploit published on GitHub. CVSS 8.9 reflects critical impact across confidentiality, integrity, and availability, though EPSS data is unavailable to assess real-world exploitation probability. Not currently listed in CISA KEV, suggesting targeted rather than widespread exploitation at time of analysis.
Remote authenticated attackers can execute arbitrary code on Totolink N300RH 3.2.4-B20220812 routers via buffer overflow in the setMacFilterRules function. Exploitation requires low-privilege authentication to the router's web interface, then sending a crafted POST request with an oversized mac_address parameter to /cgi-bin/cstecgi.cgi. Public exploit code is available (documented on Notion), significantly lowering the barrier to exploitation. EPSS data not available, but the combination of network attack vector, publicly available POC, and vulnerable IoT device suggest moderate real-world risk for internet-exposed routers with default or weak credentials.
Buffer overflow in Totolink N300RH router firmware 3.2.4-B20220812 allows authenticated remote attackers to achieve complete device compromise via crafted DNS parameter in WAN configuration requests. The vulnerability exists in the setWanConfig function within /cgi-bin/cstecgi.cgi POST handler, exploitable by manipulating the priDns argument. Public exploit code is available (CVSS E:P), and CVSS 4.0 score of 7.4 reflects high confidentiality, integrity, and availability impact on the vulnerable device with no cross-scope effects.
Buffer overflow in Totolink N300RH router firmware 3.2.4-B20220812 enables authenticated remote attackers to achieve code execution via crafted FileName parameter to the setUpgradeFW function in /cgi-bin/cstecgi.cgi. Public exploit code is available (documented in Notion). CVSS 7.4 with CVSS 4.0 Exploit maturity 'Proof-of-concept' confirms POC exists. Not listed in CISA KEV, suggesting limited real-world exploitation despite public POC.
Remote unauthenticated attackers can execute arbitrary code on Totolink N300RH routers version 3.2.4-B20220812 by sending crafted Password parameter values to the loginauth authentication function in /cgi-bin/cstecgi.cgi, triggering a stack-based buffer overflow. Exploitation probability is moderate (EPSS score not provided, but publicly available exploit code exists per VulDB reference). This affects consumer-grade wireless routers often deployed in home/SOHO environments with default internet-facing management interfaces, creating significant remote compromise risk despite the device's end-of-life status.
Remote unauthenticated buffer overflow in Totolink WA300 wireless repeater firmware version 5.2cu.7112_B20190227 enables complete device compromise via crafted HTTP POST requests to the login authentication handler. The vulnerability resides in the loginauth function within /cgi-bin/cstecgi.cgi, where insufficient validation of the http_host parameter allows attackers to overflow memory and achieve arbitrary code execution with device privileges. Publicly available exploit code exists (documented via Notion), enabling trivial exploitation with EPSS probability assessment pending but attack complexity rated low (AC:L) with no authentication barrier (PR:N).
Buffer overflow in Totolink WA300 wireless range extender firmware 5.2cu.7112_B20190227 allows authenticated remote attackers to execute arbitrary code or crash the device via crafted File parameter to the UploadCustomModule function in /cgi-bin/cstecgi.cgi. Public proof-of-concept exploit exists (documented in Notion page), enabling low-skill exploitation. EPSS data not available, but low attack complexity (AC:L) and network attack vector (AV:N) combined with public POC indicate elevated real-world risk for affected devices exposed to untrusted authenticated users.
OS command injection in Totolink A8000RU firmware 7.1cu.643_b20200521 allows remote unauthenticated attackers to execute arbitrary system commands via the 'proto' parameter in /cgi-bin/cstecgi.cgi CGI handler. A public proof-of-concept exploit exists on GitHub, significantly lowering the barrier for exploitation. CVSS 8.9 with network vector, low complexity, and no authentication requirements makes this immediately exploitable against internet-facing devices running the vulnerable firmware version.
OS command injection in Totolink A8000RU firmware 7.1cu.643_b20200521 allows remote unauthenticated attackers to execute arbitrary system commands via the User parameter in the setVpnAccountCfg function of /cgi-bin/cstecgi.cgi. Publicly available exploit code exists (GitHub POC), enabling immediate weaponization. CVSS 8.9 with full impact on confidentiality, integrity, and availability. EPSS data unavailable; not currently in CISA KEV, but the combination of network accessibility, no authentication requirement, and public exploit makes this a critical risk for internet-facing devices.
Buffer overflow in Totolink N300RT router firmware 3.4.0-B20250430 allows authenticated remote attackers with high-privilege administrative access to execute arbitrary code via crafted input to the entry_name parameter in /boafrm/formIpQoS. Public exploit code is available on GitHub demonstrating the vulnerability. EPSS data not provided, but the requirement for high-privilege authentication significantly limits real-world exploitation surface to scenarios where administrative credentials are already compromised.
Buffer overflow in Totolink N300RT 3.4.0-B20250430 enables authenticated remote code execution via the WPS configuration handler. An attacker with administrative credentials (PR:H) can send a crafted localPin parameter to /boafrm/formWsc, overflowing a buffer in the is_cmd_string_valid function (libapmib.so) to execute arbitrary code with full system access (VC:H/VI:H/VA:H). Public proof-of-concept exploit code exists on GitHub (xiaohaiyang-ai/TOTOLINK-N300RT-Buffer-Overflow), increasing weaponization risk despite requiring privileged access. EPSS data not available; no CISA KEV listing indicates exploitation not yet widespread in wild attacks.
OS command injection in the TOTOLINK A8000RU router (firmware 7.1cu.643_b20200521) lets remote attackers execute arbitrary shell commands by injecting into the admpass argument of the setLoginPasswordCfg function in /cgi-bin/cstecgi.cgi. The CGI Handler passes attacker-controlled input to a system shell without sanitization, granting full device compromise. Publicly available exploit code exists (disclosed via VulDB/GitHub); no active exploitation is confirmed in CISA KEV, and EPSS is modest at 0.89% (76th percentile).
OS command injection in the TOTOLINK A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attackers to execute arbitrary system commands by manipulating the tty_server argument passed to the setAdvancedInfoShow function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists and the CVSS 4.0 vector (AV:N/AC:L/PR:N/UI:N) indicates trivial network-based exploitation yielding full confidentiality, integrity, and availability impact. EPSS is currently low (0.89%, 76th percentile) and there is no public exploit identified as being actively used in the wild per CISA KEV.
OS command injection in the TOTOLINK A8000RU router (firmware 7.1cu.643_b20200521) allows remote attackers to execute arbitrary operating-system commands by manipulating the sys_info argument passed to the setMiniuiHomeInfoShow function of /cgi-bin/cstecgi.cgi. Per the CVSS vector the attack is network-based with no privileges or user interaction required (PR:N/UI:N), and publicly available exploit code exists (published via VulDB/GitHub), though it is not listed in CISA KEV. EPSS is low at 0.89% (76th percentile), suggesting exploitation is plausible but not yet widespread.
OS command injection in the TOTOLINK A8000RU router (firmware 7.1cu.643_b20200521) allows remote attackers to inject arbitrary operating-system commands through the telnet_enabled argument of the setTelnetCfg function in /cgi-bin/cstecgi.cgi. The flaw carries a CVSS 4.0 score of 8.9 with high impact to confidentiality, integrity, and availability, and publicly available exploit code exists, though it is not listed in CISA KEV. EPSS is modest at 0.89% (76th percentile), indicating publicly available exploit code exists but no confirmation of widespread active exploitation.
OS command injection in the TOTOLINK A8000RU router (firmware 7.1cu.643_b20200521) allows remote attackers to execute arbitrary operating-system commands by manipulating the HTTP argument processed by the CsteSystem function in /cgi-bin/cstecgi.cgi. The CVSS 4.0 vector (AV:N/AC:L/PR:N/UI:N) indicates network-reachable, unauthenticated exploitation with high impact to confidentiality, integrity, and availability. Publicly available exploit code exists and a POC has been disclosed; there is no public exploit identified as actively exploited in the wild (not on CISA KEV), and EPSS is low at 0.89%.
OS command injection in the TOTOLINK A8000RU router (firmware 7.1cu.643_b20200521) lets remote, unauthenticated attackers execute arbitrary shell commands by manipulating the 'mode' parameter passed to the setWiFiAclRules function in the /cgi-bin/cstecgi.cgi CGI handler. Publicly available exploit code exists (VulDB) and SSVC rates it automatable with total technical impact, though EPSS remains modest at 0.89% (76th percentile) and it is not listed in CISA KEV. With CVSS 4.0 of 8.9 and no authentication required, any attacker reaching the device's web interface can gain full control.
OS command injection in the TOTOLINK A8000RU router (firmware 7.1cu.643_b20200521) lets remote unauthenticated attackers execute arbitrary system commands by manipulating the 'tz' parameter of the setNtpCfg function in /cgi-bin/cstecgi.cgi. Publicly available exploit code exists (published via VulDB), and the CVSS 4.0 vector (AV:N/AC:L/PR:N/UI:N, total impact) reflects unauthenticated network reachability with full compromise, though EPSS remains modest at 0.89%. This is no public exploit identified as actively exploited - there is no CISA KEV listing at time of analysis.
OS command injection in the TOTOLINK A8000RU router (firmware 7.1cu.643_b20200521) allows remote attackers to execute arbitrary operating-system commands by manipulating the sambaEnabled argument passed to the setStorageCfg function in /cgi-bin/cstecgi.cgi. The CVSS 4.0 vector indicates network-reachable, unauthenticated exploitation (AV:N/PR:N/UI:N) with total impact on confidentiality, integrity, and availability. Publicly available exploit code exists (VulDB), though EPSS remains modest at 0.89% (76th percentile) and it is not listed in CISA KEV.
OS command injection in the TOTOLINK A8000RU router (firmware 7.1cu.643_b20200521) lets remote attackers inject arbitrary operating-system commands through the wanIdx argument of the setDmzCfg handler in /cgi-bin/cstecgi.cgi. The CGI Handler passes attacker-controlled input into a shell context without sanitization, yielding full command execution on the device. Publicly available exploit code exists and the SSVC framework rates technical impact as total and the attack as automatable, though it is not listed in CISA KEV and EPSS remains modest at 0.89%.
OS command injection in Totolink A8000RU 7.1cu.643_b20200521 allows remote unauthenticated attackers to execute arbitrary system commands via the 'merge' parameter in the setWiFiEasyCfg function of /cgi-bin/cstecgi.cgi. Publicly available exploit code exists on GitHub (Litengzheng/vuldb_new2), enabling trivial exploitation against internet-facing devices. CVSS 8.9 reflects network attack vector with no authentication required (AV:N/PR:N), and EPSS data suggests moderate real-world exploitation probability given the POC availability and low attack complexity.
OS command injection in Totolink A8000RU 7.1cu.643_b20200521 allows remote unauthenticated attackers to execute arbitrary system commands via crafted addrPrefixLen parameter to the setIpv6LanCfg function in /cgi-bin/cstecgi.cgi. CVSS 8.9 (High) with CVSS:4.0 vector indicating network-accessible, low-complexity attack requiring no privileges or user interaction. Publicly available exploit code exists (GitHub POC), enabling weaponization by threat actors. Not currently listed in CISA KEV, suggesting limited observed exploitation despite public disclosure and high severity scoring.
OS command injection in Totolink A8000RU router firmware 7.1cu.643_b20200521 allows remote unauthenticated attackers to execute arbitrary system commands via the setIptvCfg parameter in /cgi-bin/cstecgi.cgi. CVSS 8.9 (Critical) with network attack vector and no authentication required. Public exploit code available on GitHub since disclosure, significantly lowering exploitation barrier for attackers targeting internet-facing consumer routers. No vendor patch identified for this end-of-life device at time of analysis.
OS command injection in Totolink A8000RU firmware 7.1cu.643_b20200521 enables remote unauthenticated attackers to execute arbitrary system commands via the pptpPassThru parameter in the setVpnPassCfg function. Public exploit code exists on GitHub, dramatically lowering the barrier to exploitation. CVSS v4.0 base score of 8.9 reflects network attack vector, low complexity, and no authentication requirements, with high impact to confidentiality, integrity, and availability of the vulnerable device.
Command injection in Totolink A7100RU router firmware 7.4cu.2313_b20191024 allows unauthenticated remote attackers to execute arbitrary operating system commands via the admpass parameter in the setPasswordCfg function of /cgi-bin/cstecgi.cgi. Public exploit code exists (CVSS 8.9, EPSS 0.89% / 76th percentile, SSVC: POC/automatable/total impact). Not listed in CISA KEV; real-world exploitation status unconfirmed beyond POC publication.
Stack-based buffer overflow in Totolink A3002MU router firmware B20211125.1046 allows authenticated remote attackers to execute arbitrary code via crafted 'wan-url' parameter in /boafrm/formWlanSetup endpoint. Publicly available exploit code exists (PoC on GitHub). EPSS score of 0.08% (23rd percentile) indicates low observed exploitation probability despite public exploit, likely due to authentication requirement (PR:L) and narrow attack surface of legacy consumer router product.
Stack-based buffer overflow in TOTOLINK A7000R router (firmware ≤9.1.0u.6115) allows authenticated remote attackers to achieve complete system compromise via the setWiFiEasyGuestCfg CGI function. The vulnerability exists in /cgi-bin/cstecgi.cgi where unsanitized input to the ssid5g parameter triggers memory corruption, enabling arbitrary code execution with device privileges. Publicly available exploit code exists, significantly lowering the barrier to exploitation for authenticated attackers on the network.
Buffer overflow in Totolink A800R router firmware 4.1.2cu.5137_B20200730 allows authenticated remote attackers to achieve arbitrary code execution with high confidentiality, integrity, and availability impact. The vulnerability resides in the setAppEasyWizardConfig function within /lib/cste_modules/app.so, triggered by malicious input to the apcliSsid parameter. Public exploit code is available on GitHub (CVSS 7.4, CVSS:4.0). Authentication is required (PR:L), but attack complexity is low (AC:L)
OS command injection in Totolink A7100RU router firmware 7.4cu.2313_b20191024 allows unauthenticated remote attackers to execute arbitrary system commands via the Comment parameter in the setIpQosRules function exposed through /cgi-bin/cstecgi.cgi. CVSS 8.9 (Critical) with network attack vector, low complexity, and no privileges required. Publicly available exploit code exists (GitHub POC published), significantly lowering the exploitation barrier for opportunistic attackers targeting vulnerable devices.
OS command injection in Totolink A7100RU router firmware 7.4cu.2313 allows unauthenticated remote attackers to execute arbitrary system commands via the pppoeServiceName parameter in the setWanCfg function of /cgi-bin/cstecgi.cgi. Publicly available exploit code exists (GitHub POC), enabling trivial remote compromise with high impact on confidentiality, integrity, and availability. CVSS 8.9 (Critical) with network attack vector, low complexity, and no authentication required. SOHO router vulnerabilities like this are commonly targeted for botnet recruitment and lateral network movement.
OS command injection in Totolink A7100RU router firmware 7.4cu.2313_b20191024 allows unauthenticated remote attackers to execute arbitrary system commands with router privileges via crafted wizard parameters to the setWizardCfg CGI function. Publicly available exploit code exists (GitHub POC), significantly lowering the barrier to exploitation. The CVSS 4.0 score of 8.9 reflects network-accessible attack vector with no authentication or user interaction required, enabling full compromise of router confidentiality, integrity, and availability.
OS command injection in Totolink A7100RU router firmware 7.4cu.2313_b20191024 allows unauthenticated remote attackers to execute arbitrary system commands via crafted FileName parameter to the UploadFirmwareFile function in /cgi-bin/cstecgi.cgi. CVSS 9.8 (Critical) with network attack vector, no privileges required, and complete system compromise possible. Publicly available exploit code exists (GitHub POC). No vendor-released patch identified at time of analysis. EPSS data not provided, but combination of critical CVSS, unauthenticated remote vector, and public exploit indicates high real-world exploitation risk.
OS command injection in Totolink A7100RU firmware 7.4cu.2313_b20191024 allows unauthenticated remote attackers to execute arbitrary system commands via the FileName parameter in UploadOpenVpnCert function of /cgi-bin/cstecgi.cgi. Publicly available exploit code exists (POC on GitHub), enabling trivial exploitation with no authentication required. CVSS 9.8 (Critical) reflects network-based attack vector with low complexity and no privileges needed. No vendor-released patch identified at time of analysis.