Vulnerability · Published Sep 1, 2026 · Assigned by VulnCheck

CVE-2026-84190LibreNMS before 26.5.0 Remote Code Execution via AboutController

High 7.2

In plain English

A high-severity command injection in librenms from librenms. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 59% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.2High

Exploit odds (30 days)0.9%top 41.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

LibreNMS versions before 26.5.0 contain a remote code execution vulnerability in the AboutController where the snmpget configuration parameter is passed to shell_exec() without proper validation. An authenticated administrator can modify the snmpget configuration to point to a malicious executable file and trigger code execution by accessing the /about endpoint.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Packagist	librenms/librenms	26.5.0	GHSA-jf24-8g2h-2wg7

Affected products (as reported)

Vendor	Product	Versions
librenms	librenms	0 – before 26.5.0

Weakness: CWE-77 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

References

GitHub Security Advisory (GHSA-jf24-8g2h-2wg7) vendor-advisory
VulnCheck Advisory: LibreNMS before 26.5.0 Remote Code Execution via AboutController third-party-advisory