Yealink
Monthly
Stack-based buffer overflow in the Yealink SIP-T46U IP phone (firmware 108.86.0.118) allows authenticated adjacent-network attackers to corrupt memory via the BlueToothTest handler exposed by the Web FastCGI service. Supplying crafted btMac, pin, or reserved parameters to /api/inner/bttest triggers the overflow inside mod_webd.BlueToothTest, with publicly available exploit code exists demonstrating an off-by-one write. The flaw is reachable from the LAN rather than the public internet, but the vendor has not responded to disclosure and no patched firmware has been published.
Stack-based buffer overflow in the Yealink SIP-T46U IP phone (firmware 108.86.0.118) allows adjacent-network attackers with low privileges to corrupt memory via crafted uid or start_offset parameters sent to the /api/upgrade/upgrade firmware chunk upload endpoint. Publicly available exploit code exists, and the vendor did not respond to coordinated disclosure, leaving deployed devices without an official patch. CVSS 4.0 rates this 8.6 (High) with proof-of-concept maturity (E:P).
Stack-based buffer overflow in the Yealink SIP-T46U IP phone (firmware 108.86.0.118) allows adjacent-network attackers with low-privilege credentials to corrupt memory via the uid parameter of the /api/upgrade/accupgradebychunk firmware chunk upload endpoint. Publicly available exploit code exists and the vendor did not respond to coordinated disclosure, raising the practical risk despite the adjacent-only attack vector. No public exploit identified as actively exploited in the wild (not on CISA KEV).
Stack-based buffer overflow in the Yealink SIP-T46U IP phone (firmware 108.87.50.1) allows adjacent-network attackers with low-privileged access to corrupt memory via the port argument processed by the StartReportInformation function in the /api/inner/beforewifitest endpoint of the Web FastCGI Service. Publicly available exploit code exists, and the vendor was notified without response, leaving deployed devices unmitigated. No public exploit identified as active in-the-wild campaigns, but exploitation is feasible given the released PoC.
Yealink Device Management (DM) 3.6.0.20 allows command injection as root via the /sm/api/v1/firewall/zone/services URI, without authentication. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Command injection in the Yealink SIP-T46U IP phone firmware 108.86.0.118 enables authenticated, adjacent-network attackers to execute arbitrary operating system commands by manipulating the `ip` or `port` arguments submitted to the `/api/inner/tftpuploadiperf` Web FastCGI endpoint. Publicly available exploit code exists, and Yealink did not respond to responsible disclosure, meaning no vendor-released patch has been identified at time of analysis. No KEV listing confirms active exploitation, but the combination of a public proof-of-concept, an absent vendor response, and a default-enabled attack surface on widely deployed enterprise VoIP phones elevates practical risk beyond the moderate CVSS 4.0 score of 5.1.
Command injection in Yealink SIP-T46U firmware 108.86.0.118 enables remote authenticated attackers to execute arbitrary OS commands via the unsanitized `Time` argument passed to the `mod_diagnose.CommandShellByType` function at the `/api/diagnosis/start` diagnostic endpoint. The exploit leverages the Web FastCGI Service's failure to neutralize shell metacharacters before invoking underlying system commands, consistent with CWE-77. A public proof-of-concept exploit archive is confirmed available, no CISA KEV listing exists at time of analysis, and the vendor did not respond to disclosure - leaving the vulnerability unpatched.
Directory traversal in Yealink SIP-T21P(E2) IP phone firmware 52.84.0.15 exposes arbitrary files to low-privileged remote attackers via a crafted request to the diagnostic component's result read function. The flaw is confined to confidentiality impact - attackers can exfiltrate sensitive files (credentials, configuration, logs) stored on the device but cannot modify or crash it. A publicly available proof-of-concept exists, though EPSS at 0.62% indicates limited observed exploitation activity and the device is not listed in the CISA KEV catalog.
Authenticated command injection in the Yealink SIP-T21P_E2 IP phone (firmware 52.84.0.15) lets a remote user with normal, non-administrative privileges execute arbitrary operating-system commands by sending a crafted request to the ping utility of the diagnostic component. Because the CVSS vector reports PR:L, exploitation requires only a low-privileged authenticated session, and publicly available exploit code exists, though the EPSS probability remains modest at 0.60% (44th percentile) and the flaw is not listed in CISA KEV. Successful exploitation yields full high-impact compromise of confidentiality, integrity, and availability on the device.
Yealink Meeting Server before V26.0.0.67 allows attackers to obtain static key information from a front-end JS file and decrypt the plaintext passwords based on the obtained key information. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Yealink Meeting Server before V26.0.0.67 is vulnerable to sensitive data exposure in the server response via sending HTTP request with enterprise ID. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Directory Traversal in the web interface of the Tiptel IP 286 with firmware version 2.61.13.10 allows attackers to overwrite arbitrary files on the phone via the Ringtone upload function. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue in Yealink VP59 Microsoft Teams Phone firmware 91.15.0.118 (fixed in 122.15.0.142) allows a physically proximate attacker to disable the phone lock via the Walkie Talkie menu option. Rated low severity (CVSS 2.1), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
An issue discovered in Yealink VP59 Teams Editions with firmware version 91.15.0.118 allows a physically proximate attacker to gain control of an account via a flaw in the factory reset procedure. Rated medium severity (CVSS 6.8), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Directory Traversal vulnerability in Yealink VP59 v.91.15.0.118 allows a physically proximate attacker to obtain sensitive information via terms of use function in the company portal component. 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.
An issue was discovered in Yealink Configuration Encrypt Tool (AES version) and Yealink Configuration Encrypt Tool (RSA version before 1.2). Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Yealink Meeting Server before v26.0.0.66 was discovered to contain an OS command injection vulnerability via the file upload interface. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue in YeaLinkSIP-T19P-E2 v.53.84.0.15 allows a remote privileged attacker to execute arbitrary code via a crafted request the ping function of the diagnostic component. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
Multiple cross-site scripting (XSS) vulnerabilities in Local Phone book and Blacklist form in Yealink VOIP Phones allow remote authenticated users to inject arbitrary web script or HTML via the user. Rated low severity (CVSS 3.5), this vulnerability is remotely exploitable. Public exploit code available and no vendor patch available.
cgi-bin/cgiServer.exx in Yealink VoIP Phone SIP-T38G allows remote authenticated users to execute arbitrary commands by calling the system method in the body of a request, as demonstrated by running. Rated critical severity (CVSS 9.0), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and EPSS exploitation probability 11.7%.
Absolute path traversal vulnerability in Yealink VoIP Phone SIP-T38G allows remote authenticated users to read arbitrary files via a full pathname in the dumpConfigFile function in the command. Rated medium severity (CVSS 4.0), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
Directory traversal vulnerability in Yealink VoIP Phone SIP-T38G allows remote authenticated users to read arbitrary files via a .. Rated medium severity (CVSS 4.0), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
CRLF injection vulnerability in Yealink VoIP Phones with firmware 28.72.0.2 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via the model. Rated medium severity (CVSS 5.0), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
config/.htpasswd in Yealink IP Phone SIP-T38G has a hardcoded password of (1) user (s7C9Cx.rLsWFA) for the user account, (2) admin (uoCbM.VEiKQto) for the admin account, and (3) var (jhl3iZAe./qXM). Rated critical severity (CVSS 10.0), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and EPSS exploitation probability 15.4%.
Cross-site scripting (XSS) vulnerability in Yealink VoIP Phones with firmware 28.72.0.2 allows remote attackers to inject arbitrary web script or HTML via the model parameter to servlet. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable. Public exploit code available and no vendor patch available.
Stack-based buffer overflow in the Yealink SIP-T46U IP phone (firmware 108.86.0.118) allows authenticated adjacent-network attackers to corrupt memory via the BlueToothTest handler exposed by the Web FastCGI service. Supplying crafted btMac, pin, or reserved parameters to /api/inner/bttest triggers the overflow inside mod_webd.BlueToothTest, with publicly available exploit code exists demonstrating an off-by-one write. The flaw is reachable from the LAN rather than the public internet, but the vendor has not responded to disclosure and no patched firmware has been published.
Stack-based buffer overflow in the Yealink SIP-T46U IP phone (firmware 108.86.0.118) allows adjacent-network attackers with low privileges to corrupt memory via crafted uid or start_offset parameters sent to the /api/upgrade/upgrade firmware chunk upload endpoint. Publicly available exploit code exists, and the vendor did not respond to coordinated disclosure, leaving deployed devices without an official patch. CVSS 4.0 rates this 8.6 (High) with proof-of-concept maturity (E:P).
Stack-based buffer overflow in the Yealink SIP-T46U IP phone (firmware 108.86.0.118) allows adjacent-network attackers with low-privilege credentials to corrupt memory via the uid parameter of the /api/upgrade/accupgradebychunk firmware chunk upload endpoint. Publicly available exploit code exists and the vendor did not respond to coordinated disclosure, raising the practical risk despite the adjacent-only attack vector. No public exploit identified as actively exploited in the wild (not on CISA KEV).
Stack-based buffer overflow in the Yealink SIP-T46U IP phone (firmware 108.87.50.1) allows adjacent-network attackers with low-privileged access to corrupt memory via the port argument processed by the StartReportInformation function in the /api/inner/beforewifitest endpoint of the Web FastCGI Service. Publicly available exploit code exists, and the vendor was notified without response, leaving deployed devices unmitigated. No public exploit identified as active in-the-wild campaigns, but exploitation is feasible given the released PoC.
Yealink Device Management (DM) 3.6.0.20 allows command injection as root via the /sm/api/v1/firewall/zone/services URI, without authentication. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Command injection in the Yealink SIP-T46U IP phone firmware 108.86.0.118 enables authenticated, adjacent-network attackers to execute arbitrary operating system commands by manipulating the `ip` or `port` arguments submitted to the `/api/inner/tftpuploadiperf` Web FastCGI endpoint. Publicly available exploit code exists, and Yealink did not respond to responsible disclosure, meaning no vendor-released patch has been identified at time of analysis. No KEV listing confirms active exploitation, but the combination of a public proof-of-concept, an absent vendor response, and a default-enabled attack surface on widely deployed enterprise VoIP phones elevates practical risk beyond the moderate CVSS 4.0 score of 5.1.
Command injection in Yealink SIP-T46U firmware 108.86.0.118 enables remote authenticated attackers to execute arbitrary OS commands via the unsanitized `Time` argument passed to the `mod_diagnose.CommandShellByType` function at the `/api/diagnosis/start` diagnostic endpoint. The exploit leverages the Web FastCGI Service's failure to neutralize shell metacharacters before invoking underlying system commands, consistent with CWE-77. A public proof-of-concept exploit archive is confirmed available, no CISA KEV listing exists at time of analysis, and the vendor did not respond to disclosure - leaving the vulnerability unpatched.
Directory traversal in Yealink SIP-T21P(E2) IP phone firmware 52.84.0.15 exposes arbitrary files to low-privileged remote attackers via a crafted request to the diagnostic component's result read function. The flaw is confined to confidentiality impact - attackers can exfiltrate sensitive files (credentials, configuration, logs) stored on the device but cannot modify or crash it. A publicly available proof-of-concept exists, though EPSS at 0.62% indicates limited observed exploitation activity and the device is not listed in the CISA KEV catalog.
Authenticated command injection in the Yealink SIP-T21P_E2 IP phone (firmware 52.84.0.15) lets a remote user with normal, non-administrative privileges execute arbitrary operating-system commands by sending a crafted request to the ping utility of the diagnostic component. Because the CVSS vector reports PR:L, exploitation requires only a low-privileged authenticated session, and publicly available exploit code exists, though the EPSS probability remains modest at 0.60% (44th percentile) and the flaw is not listed in CISA KEV. Successful exploitation yields full high-impact compromise of confidentiality, integrity, and availability on the device.
Yealink Meeting Server before V26.0.0.67 allows attackers to obtain static key information from a front-end JS file and decrypt the plaintext passwords based on the obtained key information. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Yealink Meeting Server before V26.0.0.67 is vulnerable to sensitive data exposure in the server response via sending HTTP request with enterprise ID. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Directory Traversal in the web interface of the Tiptel IP 286 with firmware version 2.61.13.10 allows attackers to overwrite arbitrary files on the phone via the Ringtone upload function. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue in Yealink VP59 Microsoft Teams Phone firmware 91.15.0.118 (fixed in 122.15.0.142) allows a physically proximate attacker to disable the phone lock via the Walkie Talkie menu option. Rated low severity (CVSS 2.1), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
An issue discovered in Yealink VP59 Teams Editions with firmware version 91.15.0.118 allows a physically proximate attacker to gain control of an account via a flaw in the factory reset procedure. Rated medium severity (CVSS 6.8), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Directory Traversal vulnerability in Yealink VP59 v.91.15.0.118 allows a physically proximate attacker to obtain sensitive information via terms of use function in the company portal component. 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.
An issue was discovered in Yealink Configuration Encrypt Tool (AES version) and Yealink Configuration Encrypt Tool (RSA version before 1.2). Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Yealink Meeting Server before v26.0.0.66 was discovered to contain an OS command injection vulnerability via the file upload interface. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue in YeaLinkSIP-T19P-E2 v.53.84.0.15 allows a remote privileged attacker to execute arbitrary code via a crafted request the ping function of the diagnostic component. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
Multiple cross-site scripting (XSS) vulnerabilities in Local Phone book and Blacklist form in Yealink VOIP Phones allow remote authenticated users to inject arbitrary web script or HTML via the user. Rated low severity (CVSS 3.5), this vulnerability is remotely exploitable. Public exploit code available and no vendor patch available.
cgi-bin/cgiServer.exx in Yealink VoIP Phone SIP-T38G allows remote authenticated users to execute arbitrary commands by calling the system method in the body of a request, as demonstrated by running. Rated critical severity (CVSS 9.0), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and EPSS exploitation probability 11.7%.
Absolute path traversal vulnerability in Yealink VoIP Phone SIP-T38G allows remote authenticated users to read arbitrary files via a full pathname in the dumpConfigFile function in the command. Rated medium severity (CVSS 4.0), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
Directory traversal vulnerability in Yealink VoIP Phone SIP-T38G allows remote authenticated users to read arbitrary files via a .. Rated medium severity (CVSS 4.0), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
CRLF injection vulnerability in Yealink VoIP Phones with firmware 28.72.0.2 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via the model. Rated medium severity (CVSS 5.0), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
config/.htpasswd in Yealink IP Phone SIP-T38G has a hardcoded password of (1) user (s7C9Cx.rLsWFA) for the user account, (2) admin (uoCbM.VEiKQto) for the admin account, and (3) var (jhl3iZAe./qXM). Rated critical severity (CVSS 10.0), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and EPSS exploitation probability 15.4%.
Cross-site scripting (XSS) vulnerability in Yealink VoIP Phones with firmware 28.72.0.2 allows remote attackers to inject arbitrary web script or HTML via the model parameter to servlet. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable. Public exploit code available and no vendor patch available.