CVE-2016-9565: MagpieRSS, as used in the front-end component in Nagios Core before 4.2.2 might allow remote attackers to r...

Security readout for executives and security teams

Older Nagios Core web front ends used MagpieRSS in a way that could let a remote attacker abuse RSS feed handling to read or write arbitrary files. Several public references describe command injection and code execution risk. No KEV listing is provided, so active exploitation is not established by the supplied sources. Exposure is most likely where Nagios Core versions earlier than 4.2.2 are still deployed, especially reachable administrative web interfaces. Distribution-packaged Nagios instances should be checked against Red Hat and Gentoo advisories named in the source bundle. Treat this as a priority legacy-platform remediation item. The issue is old but serious, public exploit material exists, and monitoring systems often hold sensitive operational visibility. Confirm no pre-4.2.2 Nagios Core remains exposed. Mitigation focus: Upgrade Nagios Core to 4.2.2 or later where applicable.; Apply vendor-supported patched packages from Red Hat, Gentoo, or your distribution.; Retire or isolate unsupported Nagios Core installations..

Prepared

Jun 13, 2026, 13:16 UTC (UTC+00:00)

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