CRITICALCVSS v3.1 9.1Vulnerability

CVE-2026-121931

A security vulnerability has been detected in Linksys WRT54GL 4.30.18. The impacted element is the function system of the file apply.cgi of the component Traceroute Diagnostic Function. Such manipulation of the argument traceroute_ip leads to os command injection. The attack can be launched remotely. The exploit has been disclosed publicly and may 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.

Properties

Severity
CRITICAL
Nvd fetched at
2026-11-04T21:42:22.291815+00:00
Cvss severity
CRITICAL
Cvss score
9.1
Retrieved at
2026-11-04T21:43:05+00:00
Score
9.1
Cvss version
3.1
Last source
NVD
Cve id
CVE-2026-121931
Cvss vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
First seen by Signal
2026-11-04T21:38:25+00:00
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Published at
2026-11-04T19:17:33.157
Last modified
2026-11-04T19:17:33.370

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CVE-2026-121931 (CVSS v3.1 9.1) — Ninja Signal Threat Intelligence | Ninja Signal