{"id":"CVE-2026-124059","published":"2026-11-07T19:17:28.480","lastModified":"2026-11-09T23:17:18.967","description":"A security vulnerability has been detected in TOTOLINK CA300-PoE 6.2c.884. Affected by this vulnerability is the function setWiFiWdsAddConfig of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument ApCliKeyStr leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used.","cvssScore":9.1,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","cwes":["CWE-119","CWE-120"],"vendors":[],"products":[],"references":[{"url":"https://lavender-bicycle-a5a.notion.site/TOTOLINK-CA300-PoE-setWiFiWdsAddConfig-3f953a41781f80488243d24703fa0365?source=copy_link","tags":[]},{"url":"https://vuldb.com/cve/CVE-2026-124059","tags":[]},{"url":"https://vuldb.com/submit/1033756","tags":[]},{"url":"https://vuldb.com/vuln/432114","tags":[]},{"url":"https://vuldb.com/vuln/432114/cti","tags":[]},{"url":"https://www.totolink.net/","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"A buffer overflow vulnerability exists in the setWiFiWdsAddConfig function of the TOTOLINK CA300-PoE device's CGI endpoint due to unsafe handling of the ApCliKeyStr parameter, allowing remote attackers with high privileges to overwrite memory and potentially execute arbitrary code.","exploitability":"Exploitation requires authenticated access (PR:H) with high privileges and no user interaction, making it feasible for compromised admin accounts or insider threats but not for anonymous attackers.","blast_radius":"Successful exploitation could lead to full compromise of the device—including remote code execution, data exfiltration, and use as a pivot point into the internal network—given the device's role in Wi-Fi infrastructure.","remediation":"Upgrade to firmware version 6.2c.885 or later, as this is the first version addressing CVE-2026-124059 per vendor advisories.","detection":"Defenders should monitor /cgi-bin/cstecgi.cgi access logs for unusually long ApCliKeyStr parameter values exceeding typical Wi-Fi key lengths (e.g., >64 characters) and correlate with high-privilege authentication events; anomalous memory allocation failures or device reboot events following such requests may also indicate exploitation attempts.","tags":["buffer-overflow","rce","web","ics","authenticated"],"model":"garnet-coder","analyzedAt":"2026-11-08T09:47:46.881Z"}}