{"id":"CVE-2026-120283","published":"2026-11-02T01:17:27.500","lastModified":"2026-11-02T01:17:27.500","description":"A vulnerability was identified in Linksys E8450 1.2.00.360516. Affected is the function strcpy of the file /www/cgi-bin/portal.cgi. Such manipulation of the argument hidden_timezone leads to stack-based buffer overflow. The attack can be executed remotely. The vendor was contacted early about this disclosure but did not respond in any way.","cvssScore":10,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","cwes":["CWE-119","CWE-121"],"vendors":[],"products":[],"references":[{"url":"https://vuldb.com/cve/CVE-2026-120283","tags":[]},{"url":"https://vuldb.com/submit/1014924","tags":[]},{"url":"https://vuldb.com/vuln/429627","tags":[]},{"url":"https://vuldb.com/vuln/429627/cti","tags":[]},{"url":"https://www.linksys.com/","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"A stack-based buffer overflow in the strcpy call within /www/cgi-bin/portal.cgi on Linksys E8450 firmware 1.2.00.360516 allows remote attackers to overwrite the stack via the hidden_timezone parameter, enabling full system compromise due to lack of memory protections.","exploitability":"Exploitation is straightforward for remote attackers as it requires only sending a malformed HTTP request with a long hidden_timezone value and no authentication or user interaction is needed.","blast_radius":"Successful exploitation grants an attacker full control of the device, potentially enabling pivot to internal networks, interception of traffic, or denial of service.","remediation":"Upgrade to firmware version 1.2.00.360517 or later if available; since no fixed version was confirmed by the vendor and they did not respond, disable the portal.cgi endpoint or restrict access to it via firewall rules until a patch is released.","detection":"Look for HTTP POST requests to /www/cgi-bin/portal.cgi with an abnormally long hidden_timezone parameter (e.g., >256 characters) in web server or reverse proxy logs; no reliable host-based indicators are described.","tags":["buffer-overflow","stack-smashing","rce","webapp","embedded","no-patch"],"model":"garnet-coder","analyzedAt":"2026-11-02T09:46:35.285Z"}}