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CVE-2026-121931

CVSS 4.0
8.5 high
CISA KEV
Not listed
Technical details
Weakness
CWE-77, CWE-78
EPSS · 05 Nov 2026
Unavailable
Public resources
None found
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P

No VulnCrest analysis published for this CVE yet. Below is the original CNA/NVD description, unmodified.

Description

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.

Exploits & detection

No public PoC or detection template found yet.

Timeline

  • Published: 04 Nov 2026
  • Last modified upstream: 04 Nov 2026

Sources & licenses

CVE / CVSS / CWE
NVD record ↗ (unmodified). This product uses the NVD API but is not endorsed or certified by the NVD. CVE® © The MITRE Corporation.
Exploitation
CISA KEV (CC0) · EPSS by FIRST.org
References used for the analysis
Analysis, summary and remediation
© VulnCrest

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