CVE-2026-121930

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.

• CWE-77
• CWE-78

• https://github.com/Zimo-666/WRT54GL-cves/tree/main/CVE-TBD-ping-ip-command-injection
• https://vuldb.com/cve/CVE-2026-121930
• https://vuldb.com/submit/1024098
• https://vuldb.com/vuln/431042
• https://vuldb.com/vuln/431042/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.
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