RCE in Librenms
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.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.009 (57.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.009 · change: +0.003
Affected products
Weakness classification (CWE)
References
- github.com/librenms/librenms/security/advisories/GHSA-jf24-8g2h-2wg7 (vendor-advisory)
- www.vulncheck.com/advisories/librenms-before-26.5.0-remote-code-execution-via-a… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-84190?
- CVE-2026-84190 is a high-severity vulnerability in Librenms, classified under Command Injection. CVSS score: 7.2/10. Published 2026-09-01.
- How severe is CVE-2026-84190?
- High severity. CVSS v3 base score is 7.2 out of 10.