CVE-2018-13441: Nagios

Medium severity, CVSS 5.5. EPSS: 1.3% chance of exploitation in the next 30 days.

qh_help in Nagios Core version 4.4.1 and earlier is prone to a NULL pointer dereference vulnerability, which allows attacker to cause a local denial-of-service condition by sending a crafted payload to the listening UNIX socket.

Affected products

• Nagios Nagios: up to and including 4.4.1

Published 2018-07-12. Last modified 2026-06-17.