Stack-based Buffer Overflow
A stack-based buffer overflow occurs when a program writes more data to a buffer located on the stack than it was allocated to hold.
How It Works
A stack-based buffer overflow occurs when a program writes more data to a buffer located on the stack than it was allocated to hold. The stack stores local variables, function parameters, and critical control information including the return address that tells the CPU where to resume execution after a function completes. When an attacker overflows a buffer, they can overwrite adjacent memory, including this return address.
The classic exploitation path involves carefully crafting input to overwrite the return address with a pointer to attacker-controlled code. Historically, attackers would inject shellcode directly into the overflowed buffer, then redirect execution to it. Modern defenses like Data Execution Prevention (DEP/NX) mark the stack as non-executable, forcing attackers to use Return-Oriented Programming (ROP) instead—chaining together existing code snippets ("gadgets") to perform malicious operations without injecting new code.
Address Space Layout Randomization (ASLR) randomizes memory addresses to make exploitation harder, but attackers can defeat it through information disclosure vulnerabilities that leak memory addresses. Stack canaries—random values placed between buffers and control data—can detect overwrites, but may be bypassed through brute-force attacks or by carefully avoiding them in partial overwrites.
Impact
- Arbitrary code execution at the privilege level of the vulnerable process
- Complete system compromise if the vulnerable process runs with elevated privileges (root/SYSTEM)
- Memory corruption leading to crashes and denial of service
- Bypass of authentication mechanisms by redirecting execution flow around security checks
- Data theft or modification through code injection that accesses sensitive memory regions
Real-World Examples
The Morris Worm (1988) exploited a stack overflow in the Unix fingerd daemon, becoming one of the first major internet worms. The Code Red worm (2001) leveraged a stack overflow in Microsoft IIS (CVE-2001-0500) to compromise hundreds of thousands of web servers, demonstrating the massive scale of automated exploitation.
More recently, EternalBlue exploited stack corruption in Windows SMB (CVE-2017-0144), enabling the WannaCry and NotPetya ransomware outbreaks that caused billions in damage. The Heartbleed bug (CVE-2014-0160), while technically a heap-based read overflow, demonstrated how buffer handling errors remain prevalent even in security-critical software like OpenSSL.
Mitigation
- Stack canaries (compile with
-fstack-protector-allor equivalent) to detect overwrites before return - Address Space Layout Randomization (ASLR) to randomize memory locations
- DEP/NX bit enforcement to prevent code execution from stack memory
- Memory-safe string functions (use
strncpy,snprintf,strlcpyinstead ofstrcpy,sprintf,gets) - Compiler hardening flags (
-D_FORTIFY_SOURCE=2, control-flow integrity) - Input validation with strict bounds checking on all externally-supplied data
- Memory-safe languages (Rust, Go) for new development to eliminate the vulnerability class entirely
Recent CVEs (2223)
ALGO 8180 has a stack-based buffer overflow in SIP INVITE Alert-Info header processing, enabling remote code execution through the VoIP protocol.
ALGO 8180 has a stack-based buffer overflow in SIP INVITE Replaces header processing enabling remote code execution through crafted VoIP calls.
Tenda AX3 firmware has another stack-based buffer overflow in formGetIptv through a different input path, enabling remote code execution.
Stack-based buffer overflow in Tenda AX1803 firmware version 1.0.0.1 allows unauthenticated remote attackers to execute arbitrary code by manipulating guest network parameters in the /goform/WifiGuestSet function. Public exploit code exists for this vulnerability, and no patch is currently available. This affects devices running the vulnerable firmware with network-accessible management interfaces.
ArduinoCore-avr contains the source code and configuration files of the Arduino AVR Boards platform. A vulnerability in versions prior to 1.8.7 allows an attacker to trigger a stack-based buffer overflow when converting floating-point values to strings with high precision. By passing very large `decimalPlaces` values to the affected String constructors or concat methods, the `dtostrf` function writes beyond fixed-size stack buffers, causing memory corruption and denial of service. Under speci...
Tenda AX3 firmware has a third stack-based buffer overflow in formGetIptv, allowing unauthenticated remote code execution through the router's web interface.
Tenda AX3 firmware has a second stack overflow in formSetIptv via the vlanId parameter, allowing remote code execution through the IPTV configuration endpoint.
Tenda AX3 firmware v16.03.12.11 has a stack overflow in formSetIptv via the list parameter, enabling remote attackers to crash the router or execute arbitrary code.
Tenda AX1803 v1.0.0.1 was discovered to contain a stack overflow in the security_5g parameter of the sub_727F4 function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request. [CVSS 7.5 HIGH]
Tenda AX1803 v1.0.0.1 was discovered to contain a stack overflow in the security parameter of the sub_72290 function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request. [CVSS 7.5 HIGH]
Tenda AX-1806 v1.0.0.1 was discovered to contain a stack overflow in the time parameter of the sub_60CFC function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request. [CVSS 7.5 HIGH]
Tenda AX-1803 v1.0.0.1 was discovered to contain a stack overflow in the ssid parameter of the form_fast_setting_wifi_set function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request. [CVSS 7.5 HIGH]
Tenda AX-1806 v1.0.0.1 was discovered to contain a stack overflow in the deviceList parameter of the formSetMacFilterCfg function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request. [CVSS 7.5 HIGH]
Tenda AX-1806 v1.0.0.1 was discovered to contain a stack overflow in the deviceList parameter of the formSetWifiMacFilterCfg function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request. [CVSS 7.5 HIGH]
Imagemagick versions up to 7.1.2-13 is affected by loop with unreachable exit condition (infinite loop) (CVSS 5.5).
Tenda AX-1806 v1.0.0.1 was discovered to contain a stack overflow in the security parameter of the sub_4C408 function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request. [CVSS 7.5 HIGH]
Tenda AX-1806 v1.0.0.1 was discovered to contain a stack overflow in the timeZone parameter of the fromSetSysTime function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request. [CVSS 7.5 HIGH]
Denial-of-service in Juniper Junos OS Packet Forwarding Engine allows authenticated attackers to crash Forwarding Processor Cards by subscribing to telemetry sensors at scale, forcing service restarts and network disruption. The vulnerability affects Junos versions before 22.4R3-S7, 23.2R2-S4, and 23.4R2, with no patch currently available. Installation of specific YANG sensor packages mitigates the issue.
A stack overflow in the dump_ttxt_sample function of GPAC v2.4.0 allows attackers to cause a Denial of Service (DoS) via a crafted packet. [CVSS 7.5 HIGH]
Tenda AX-1806 v1.0.0.1 was discovered to contain a stack overflow in the mac parameter of the sub_65B5C function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request. [CVSS 7.5 HIGH]
A stack overflow in the pcmreframe_flush_packet function of GPAC v2.4.0 allows attackers to cause a Denial of Service (DoS) via a crafted WAV file. [CVSS 5.5 MEDIUM]
A stack overflow in the dmx_saf function of GPAC v2.4.0 allows attackers to cause a Denial of Service (DoS) via a crafted .saf file. [CVSS 5.5 MEDIUM]
Tenda AX-1806 v1.0.0.1 was discovered to contain a stack overflow in the wanSpeed parameter of the sub_65B5C function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request. [CVSS 7.5 HIGH]
Tenda AX-1806 v1.0.0.1 was discovered to contain a stack overflow in the cloneType parameter of the sub_65B5C function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request. [CVSS 7.5 HIGH]
Tenda AX-1806 v1.0.0.1 was discovered to contain a stack overflow in the serverName parameter of the sub_65A28 function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request. [CVSS 7.5 HIGH]
Tenda AX-1806 v1.0.0.1 was discovered to contain a stack overflow in the serviceName parameter of the sub_65A28 function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request. [CVSS 7.5 HIGH]
Inbit Messenger 4.6.0-4.9.0 has a second stack buffer overflow in the network handler. SEH overwrite leads to shellcode execution on Windows. PoC available.
Inbit Messenger 4.6.0-4.9.0 has unauthenticated RCE through a stack overflow in the XML protocol on port 10883. PoC available.
A stack overflow vulnerability exists in the AOS-10 web-based management interface of a Mobility Gateway. Successful exploitation could allow an authenticated malicious actor to execute arbitrary code as a privileged user on the underlying operating system. [CVSS 7.2 HIGH]
Local privilege escalation in Azure Connected Machine Agent exploits a stack-based buffer overflow, enabling authenticated users to gain elevated system privileges. The vulnerability affects Azure and Stack Overflow deployments and requires local access with valid credentials to exploit. No patch is currently available for this high-severity issue.
Tenda AX-3 v16.03.12.10_CN was discovered to contain a stack overflow in the wanMTU2 parameter of the fromAdvSetMacMtuWan function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request. [CVSS 7.5 HIGH]
Tenda AX-3 v16.03.12.10_CN was discovered to contain a stack overflow in the wanSpeed2 parameter of the fromAdvSetMacMtuWan function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request. [CVSS 7.5 HIGH]
Tenda AX-3 v16.03.12.10_CN was discovered to contain a stack overflow in the cloneType2 parameter of the fromAdvSetMacMtuWan function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request. [CVSS 7.5 HIGH]
Tenda AX-3 v16.03.12.10_CN was discovered to contain a stack overflow in the serviceName2 parameter of the fromAdvSetMacMtuWan function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request. [CVSS 7.5 HIGH]
Tenda AX-3 v16.03.12.10_CN was discovered to contain a stack overflow in the mac2 parameter of the fromAdvSetMacMtuWan function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request. [CVSS 7.5 HIGH]
Tenda AX-1806 v1.0.0.1 was discovered to contain a stack overflow in the security_5g parameter of the sub_4CA50 function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request. [CVSS 7.5 HIGH]
There is a Stack overflow Vulnerability in the device Search and Discovery feature of Hikvision NVR/DVR/CVR/IPC models. If exploited, an attacker on the same local area network (LAN) could cause the device to malfunction by sending specially crafted packets to an unpatched device. [CVSS 8.8 HIGH]
There is a Stack overflow Vulnerability in the device Search and Discovery feature of Hikvision Access Control Products. If exploited, an attacker on the same local area network (LAN) could cause the device to malfunction by sending specially crafted packets to an unpatched device. [CVSS 8.8 HIGH]
RIOT OS ethos utility has a stack buffer overflow in _handle_char() due to missing bounds checking on serial frame data. Incoming frame bytes overflow a fixed-size stack buffer.
RIOT OS (IoT operating system) tapslip6 utility has a stack buffer overflow due to unbounded strcpy/strcat with user-controlled device name input. PoC available.
TinyOS versions up to and including 2.1.2 contain a stack-based buffer overflow vulnerability in the mcp2200gpio utility. The vulnerability is caused by unsafe use of strcpy() and strcat() functions when constructing device paths during automatic device discovery.
A flaw was found in GNU Wget2. This vulnerability, a stack-based buffer overflow, occurs in the filename sanitization logic when processing attacker-controlled URL paths, particularly when filename restriction options are active. [CVSS 7.6 HIGH]
Libsoup's NTLM authentication handler crashes when processing exceptionally long passwords due to a signed integer overflow in memory allocation calculations, affecting GNOME and applications relying on this library for network operations. An unauthenticated remote attacker can trigger a denial-of-service condition by sending specially crafted authentication requests. No patch is currently available.
Stack-based buffer overflow in libtasn1 version: v4.20.0. The function fails to validate the size of input data resulting in a buffer overflow in asn1_expend_octet_string. [CVSS 7.5 HIGH]
Panda3D egg-mkfont (through 1.10.16) has a stack buffer overflow via an unbounded sprintf() with attacker-controlled glyph pattern input. PoC available.
Local denial of service in iccDEV versions prior to 2.3.1.2 stems from a stack overflow in the calculator parser component, allowing unauthenticated users to crash the application through crafted input. Public exploit code exists for this vulnerability, which affects Stack Overflow and Iccdev products. A patch is available in version 2.3.1.2 and should be applied immediately.
iccDEV versions prior to 2.3.1.2 are vulnerable to stack overflow through malformed XML calculator macro expansion, allowing local attackers to trigger a denial of service condition. Public exploit code exists for this vulnerability, which affects ICC color profile manipulation tools used in Stack Overflow and Iccdev products. A patch is available in version 2.3.1.2 and should be applied promptly to mitigate exploitation risk.
Availability loss and potential remote code execution in libcoap (versions up to and including 4.3.5, before commit 30db3ea) arises when attacker-controlled hostname data from a proxied CoAP URI is copied into a fixed 256-byte stack buffer during address resolution without bounds checking. A remote unauthenticated attacker can reliably crash any application that enables libcoap's proxy request handling, and may achieve code execution depending on the target's compiler hardening and runtime memory protections. There is no public exploit identified at time of analysis and it is not listed in CISA KEV; the official CVSS 4.0 base score is 8.2, but that score reflects availability impact only (VA:H, VC:N/VI:N).
Stack-based buffer overflow in the ONVIF SOAP XML parser of TP-Link Tapo C200 v3 (firmware ≤1.4.1) and C520WS v2.6 cameras enables unauthenticated remote code execution from adjacent networks. Attackers can send crafted SOAP requests with oversized namespace prefixes to trigger memory corruption and achieve full device compromise with elevated privileges. EPSS probability and KEV status indicate no public exploit identified at time of analysis, though the vulnerability affects widely deployed consumer IoT cameras with network exposure.
Tenda AX3 v16.03.12.11 contains a stack overflow in formSetIptv via the iptvType parameter, which can cause memory corruption and enable remote code execution (RCE).
A stack-based buffer overflow vulnerability [CWE-121] in WatchGuard Fireware OS's certificate request command could allow an authenticated privileged user to execute arbitrary code via specially crafted CLI commands.This issue affects Fireware OS: from 12.0 through 12.5.12+701324, from 12.6 through 12.11.2.
Stack-based buffer overflow vulnerability in Circutor SGE-PLC1000/SGE-PLC50 v9.0.2. In the 'SetUserPassword()' function, the 'newPassword' parameter is directly embedded in a shell command string using 'sprintf()' without any sanitisation or validation, and then executed using 'system()'. This allows an attacker to inject arbitrary shell commands that will be executed with the same privileges as the application.
Stack-based buffer overflow vulnerability in Circutor SGE-PLC1000/SGE-PLC50 v9.0.2. In the 'ShowMeterPasswords()' function, there is an unlimited user input that is copied to a fixed-size buffer via 'sprintf()'. The 'GetParameter(meter)' function retrieves the user input, which is directly incorporated into a buffer without size validation. An attacker can provide an excessively large input for the 'meter' parameter.
Stack-based buffer overflow vulnerability in Circutor SGE-PLC1000/SGE-PLC50 v9.0.2. In the 'ShowMeterDatabase()' function, there is an unlimited user input that is copied to a fixed-size buffer via 'sprintf()'. The 'GetParameter(meter)' function retrieves the user input, which is directly incorporated into a buffer without size validation. An attacker can provide an excessively large input for the 'meter' parameter.
Stack-based buffer overflow vulnerability in Circutor SGE-PLC1000/SGE-PLC50 v9.0.2. The vulnerability is found in the 'AddEvent()' function when copying the user-controlled username input to a fixed-size buffer (48 bytes) without boundary checking. This can lead to memory corruption, resulting in possible remote code execution.
Stack-based buffer overflow vulnerability in Circutor SGE-PLC1000/SGE-PLC50 v9.0.2. The 'ShowDownload()' function uses “sprintf()” to format a string that includes the user-controlled input of 'GetParameter(meter)' in the fixed-size buffer 'acStack_4c' (64 bytes) without checking the length. An attacker can provide an excessively long value for the 'meter' parameter that exceeds the 64-byte buffer size.
Stack-based buffer overflow vulnerability in CircutorSGE-PLC1000/SGE-PLC50 v9.0.2. The 'SetLan' function is invoked when a new configuration is applied. This new configuration function is activated by a management web request, which can be invoked by a user when making changes to the 'index.cgi' web application. The parameters are not being sanitised, which could lead to command injection.
In display, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS10196993; Issue ID: MSV-4804.
Stack-based Buffer Overflow vulnerability in ABB Terra AC wallbox.8.33. Rated medium severity (CVSS 6.9), this vulnerability is low attack complexity. No vendor patch available.
Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Security Point (Windows) of MaLion and MaLionCloud contains a stack-based buffer overflow vulnerability in processing HTTP headers. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A stack buffer overflow vulnerability has been identified in certain router models. Rated medium severity (CVSS 6.9), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
A buffer overflow with Xilinx Run Time Environment may allow a local attacker to read or corrupt data from the advanced extensible interface (AXI), potentially resulting in loss of confidentiality,. Rated high severity (CVSS 7.3), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
An out-of-bounds read was addressed with improved bounds checking. Rated medium severity (CVSS 4.3), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Tenda AC21 V16.03.08.16 is vulnerable to Buffer Overflow via the urls parameter of /goform/saveParentControlInfo. Rated medium severity (CVSS 4.3), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Tenda AC21 V16.03.08.16 is vulnerable to Buffer Overflow via the rebootTime parameter of /goform/SetSysAutoRebbotCfg. Rated medium severity (CVSS 4.3), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Tenda AC21 V16.03.08.16 is vulnerable to Buffer Overflow via the list parameter of /goform/setPptpUserList. Rated medium severity (CVSS 4.3), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Tenda AC21 V16.03.08.16 is vulnerable to Buffer Overflow in: /goform/SetVirtualServerCfg via the list parameter. Rated medium severity (CVSS 4.3), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
A Stack-based buffer overflow vulnerability in the SonicOS SSLVPN service allows a remote unauthenticated attacker to cause Denial of Service (DoS), which could cause an impacted firewall to crash. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A stack-based buffer overflow vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2 all versions, FortiOS 7.0 all versions, FortiOS 6.4 all versions, FortiOS. Rated high severity (CVSS 7.5), this vulnerability is no authentication required. No vendor patch available.
A stack-based buffer overflow vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2 all versions, FortiOS 7.0 all versions, FortiOS 6.4 all versions allows. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable. No vendor patch available.
There is a vulnerability in the Supermicro BMC web function at Supermicro MBD-X13SEDW-F. Rated high severity (CVSS 7.2), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Stack buffer overflow vulnerability exists in the Supermicro BMC Shared library. Rated medium severity (CVSS 5.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
There is a vulnerability in the Supermicro BMC web function at Supermicro MBD-X13SEDW-F. Rated high severity (CVSS 7.2), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Stack-based buffer overflow in the SMASH-CLP shell. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Rockwell Automation Arena® suffers from a stack-based buffer overflow vulnerability. Rated high severity (CVSS 7.1), this vulnerability is no authentication required. No vendor patch available.
A buffer overflow vulnerability exists in the TOTOLINK A950RG Router firmware V5.9c.4592_B20191022_ALL within the `global.so` binary. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
A stack buffer overflow vulnerability exists in the D-Link DIR-816A2 router firmware DIR-816A2_FWv1.10CNB05_R1B011D88210.img in the upload.cgi module, which handles firmware version information. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
A stack buffer overflow vulnerability exists in the D-Link DIR-878A1 router firmware FW101B04.bin in the rc binary's USB storage handling module. Rated medium severity (CVSS 6.8), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
A stack-based buffer overflow exists in the get_merge_mac function of the httpd binary on Linksys E1200 v2 routers (Firmware E1200_v2.0.11.001_us.tar.gz). Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
A stack-based buffer overflow vulnerability exists in the makeRequest.cgi binary of Linksys RE7000 routers (Firmware FW_v2.0.15_211230_1012). Rated high severity (CVSS 8.4), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
A stack-based buffer overflow vulnerability exists in the mtk_dut binary of Linksys E7350 routers (Firmware 1.1.00.032). Rated medium severity (CVSS 5.9), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
A stack-based buffer overflow exists in the validate_static_route function of the httpd binary on Linksys E1200 v2 routers (Firmware E1200_v2.0.11.001_us.tar.gz). Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
A stack-based buffer overflow vulnerability exists in the libshared.so library of Cisco Linksys E1200 v2 routers (Firmware E1200_v2.0.11.001_us.tar.gz). Rated high severity (CVSS 8.4), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
A stack-based buffer overflow exists in the httpd binary of Linksys E1200 v2 routers (Firmware E1200_v2.0.11.001_us.tar.gz). Rated high severity (CVSS 8.8), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
A stack-based buffer overflow vulnerability exists in the Linksys E1200 v2 router firmware that allows remote attackers to execute arbitrary code or cause denial of service without authentication. The vulnerability occurs in the httpd binary's get_merge_ipaddr function, which improperly concatenates user-supplied CGI parameters into a fixed-size buffer without bounds checking. With publicly available proof-of-concept exploits and an EPSS score of 0.57% (68th percentile), this represents a moderate exploitation risk for affected devices.
A stack buffer overflow vulnerability exists in the ToToLink LR1200GB (V9.1.0u.6619_B20230130) and NR1800X (V9.1.0u.6681_B20230703) Router firmware within the cstecgi.cgi binary (setDefResponse. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.