Remote Code Execution Vulnerability in LibreNMS by LibreNMS
CVE-2026-84190

8.7HIGH

Key Information:

Vendor

Librenms

Status
Librenms
Vendor
CVE Published:
1 September 2026

What is CVE-2026-84190?

LibreNMS versions prior to 26.5.0 possess a vulnerability in the AboutController that allows for remote code execution. This occurs when the snmpget configuration parameter is passed to the shell_exec() function without adequate validation measures. An authenticated administrator can exploit this vulnerability by modifying the snmpget configuration to reference a malicious executable. This can lead to unauthorized code execution upon accessing the /about endpoint, posing significant security risks.

Affected Version(s)

librenms 0 < 26.5.0

librenms 26.5.0

References

https://github.com/librenms/librenms/security/advisories/...
vendor-advisory
https://www.vulncheck.com/advisories/librenms-before-26.5...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

tCu0n9
.