CVE-2026-121930 Linksys WRT54GL Ping Diagnostic apply.cgi system os command injection
CriticalCVSS 9.4
- Published
- Updated
- Exploit status
- No public exploit known
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.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linksys wrt54gl | = 4.30.18 | No fix listed |
References
- VDB-431042 | Linksys WRT54GL Ping Diagnostic apply.cgi system os command injection technical-description vdb-entry
- VDB-431042 | CTI Indicators (IOB, IOC, TTP, IOA) permissions-required signature
- CVE-2026-121930 | CVE Analysis and Report third-party-advisory
- Submit #1024098 | Linksys WRT54GL 4.30.18 OS Command Injection (CWE-78) third-party-advisory
- github.com exploit
- www.linksys.com product