CVE-2026-84190

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.

CVSS 4.0

8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

7.2CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS

0.9% chance of exploitation in the next 30 days; higher than 58% of CVEs (scores of 2026-10-25)

CWE

CWE-77

Published

2026-09-01

Modified

2026-10-08

Record from

the NVD, synced 2026-10-19

References

• https://github.com/librenms/librenms/security/advisories/GHSA-jf24-8g2h-2wg7
• https://www.vulncheck.com/advisories/librenms-before-26.5.0-remote-code-execution-via-aboutcontroller
• https://github.com/librenms/librenms/security/advisories/GHSA-jf24-8g2h-2wg7

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