CVE-2018-25123: Nagios XI

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

Nagios XI versions prior to 5.5.7 contain a privilege escalation vulnerability in the MRTG graphing component. MRTG-related processes/scripts executed with excessive privileges, allowing a local attacker with limited system access to abuse file/command execution paths or writable resources to gain elevated privileges.

Affected products

• Nagios Nagios XI: before 5.5.7 (fixed in 5.5.7)

Published 2025-10-30. Last modified 2026-06-17.