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Status published
Critical
CVE-2025-39666
omd: Local privilege escalation when executing omd commands as root
Vulnerability Description
Local privilege escalation in Checkmk 2.2.0 (EOL), Checkmk 2.3.0 before 2.3.0p46, Checkmk 2.4.0 before 2.4.0p25, and Checkmk 2.5.0 (beta) before 2.5.0b3 allows a site user to escalate their privileges to root, by manipulating files in the site context that are processed when the `omd` administrative command is run by root.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
More from Checkmk GmbH
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Exposure of SSH Private Keys in Remote Alert Handlers (Linux) Rule
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CVE-2025-64999
Cross-site scripting in HTML logs of Synthetic Monitoring test services
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CVE-2025-64998
Session hijacking via exposed session signing secret in distributed Checkmk setups
High
7.3
CVE-2025-64997
Insufficient permission validation when showing agent information
Medium
6.3
CVE-2025-64996
Overly broad file permissions in the mk_inotify plugin allows reading and manipulating the plugin's output
Medium
4.8
Affected Vendor
Checkmk GmbH
View all reports →Affected Software
Checkmk
Vulnerable Versions:
2.2.0, 2.3.0, 2.4.0, 2.5.0b1
Timeline
Official Publish:
April 7th, 2026
Last Modified:
April 7th, 2026
Added to House:
July 22nd, 2026