[ CVE-2026-121930 · Published 4 Nov 2026 ]
Vulnerability in Linksys WRT54GL
CVSS 9.1
No fix listed yet
[ Why it matters ]Priority signals
- Critical severity: CVSS 9.1
[ Description ]Official description
A weakness has been identified in Linksys WRT54GL 4.30.18. The affected element is the function system of the file apply.cgi of the component Ping Diagnostic. This manipulation of the argument ping_ip causes os command injection. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks. 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.
[ Fixes ]Fixes and patches
No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.