CVE-2020-28909: Incorrect File Permissions in Nagios Fusion 4.1.8 and earlier allows for Privilege Escalation to root via m...

Security readout for executives and security teams

CVE-2020-28909 is a privilege escalation issue in Nagios Fusion 4.1.8 and earlier. A low-privileged user could modify files that are later executed with sudo, potentially gaining root control of the monitoring server. Exposure is most likely on Nagios Fusion 4.1.8 or earlier hosts where low-privileged users can access and modify the affected scripts. The provided sources do not identify affected CPEs or a complete version range beyond 4.1.8 and earlier. Prioritize remediation for internet-adjacent or multi-user monitoring servers. Root compromise of a monitoring platform can expose credentials, infrastructure visibility, and operational control. Urgency is high where low-privileged accounts exist on the host, but public evidence here does not prove active exploitation. Mitigation focus: Identify any Nagios Fusion systems running 4.1.8 or earlier.; Check Nagios guidance and change logs for the applicable fixed release.; Restrict low-privileged access to Fusion hosts until remediated..

Prepared

Jun 2, 2026, 19:53 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.