CVE-2026-121616

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/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.

• CWE-119
• CWE-787

• https://github.com/Zimo-666/E5600-cves/tree/main/03-mesh-login-global-overflow
• https://vuldb.com/cve/CVE-2026-121616
• https://vuldb.com/submit/1023312
• https://vuldb.com/vuln/430464
• https://vuldb.com/vuln/430464/cti
• https://www.linksys.com/

Published

Nov 4, 2026

Last Modified

Nov 4, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-121608A vulnerability was determined in Qihoo 360 D603-2, D600-2 a…7.3
• CVE-2026-121609A vulnerability was identified in Qihoo 360 Whole Home Route…10
• CVE-2026-12161Improper input validation in the SSH Elevate Shell feature a…8.8
• CVE-2026-121610A security flaw has been discovered in funadmin 7.1.0. Impac…7.3
• CVE-2026-121614Docker Sandboxes versions 0.31.0 before 0.50.0 do not neutra…7.1
• CVE-2026-121615A vulnerability was determined in Linksys E5600 1.1.0.26. Af…10
• CVE-2026-121617A security flaw has been discovered in Linksys E5600 1.1.0.2…7.5
• CVE-2026-121618A weakness has been identified in Linksys E5600 1.1.0.26. Th…5.3
• CVE-2026-12162Improper host validation in the social login autofill featur…5.5
• CVE-2026-121620CoopCycle coopcycle-web 5.6.0 before 6.20.0 contains a missi…6.5
• CVE-2026-121621A command injection vulnerability was found in Argo CD Image…8.8
• CVE-2026-121624Nanosystems Supremo for Windows and macOS before 5.0.2.3874 …6.8