{"id":"CVE-2026-121616","title":"Linksys E5600 JSON Request mesh_login.cgi strcpy out-of-bounds write","summary":"A vulnerability was identified in Linksys E5600 1.1.0.26. Affected by this vulnerability is the function strcpy of the file /cgi-bin/mesh_login.cgi of the component JSON Request Parser. The manipulation of the argument username/password/…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:C","cvssSource":"cna","cwe":["CWE-787","CWE-119"],"vendor":"Linksys","product":"E5600","affected":["E5600 1.1.0.26"],"published":"2026-11-04","updated":"2026-11-04","sourceUpdated":"2026-11-04T02:30:21.965Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-121616","references":[{"url":"https://vuldb.com/vuln/430464","label":"VDB-430464 | Linksys E5600 JSON Request mesh_login.cgi strcpy out-of-bounds write"},{"url":"https://vuldb.com/vuln/430464/cti","label":"VDB-430464 | CTI Indicators (IOB, IOC, IOA)"},{"url":"https://vuldb.com/cve/CVE-2026-121616","label":"CVE-2026-121616 | CVE Analysis and Report"},{"url":"https://vuldb.com/submit/1023312","label":"Submit #1023312 | Linksys E5600 1.1.0.26 Buffer Overflow - Out-of-bounds Write (CWE-787)"},{"url":"https://github.com/Zimo-666/E5600-cves/tree/main/03-mesh-login-global-overflow"},{"url":"https://www.linksys.com/"}],"tags":["cve.org"],"epss":0.00301,"epssPercentile":0.23016,"ingestedAt":"2026-11-05T20:33:06.662Z","slug":"CVE-2026-121616","body":"## Overview\n\nA vulnerability was identified in Linksys E5600 1.1.0.26. Affected by this vulnerability is the function strcpy of the file /cgi-bin/mesh_login.cgi of the component JSON Request Parser. The manipulation of the argument username/password/token/source/cn/action leads to out-of-bounds write. The attack may be initiated remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way. This vulnerability only affects products that are no longer supported by the maintainer.\n\n## Affected\n\n- `E5600 1.1.0.26`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}