High severity · published Sep 1, 2026
CVE-2026-84190
LibreNMS before 26.5.0 Remote Code Execution via AboutController
7.2
CVSS
0.9%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 58% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
librenms · librenms
before 26.5.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-84190
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-84190
vendor-advisory
https://github.com/librenms/librenms/security/advisories/GHSA-jf24-8g2h-2wg7
third-party-advisory
https://www.vulncheck.com/advisories/librenms-before-26.5.0-remote-code-execution-via-aboutcontroller
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