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CVE-2025-39666

CRITICAL CVSS 4.0: 9.3 EPSS 0.01%
Updated Apr 07, 2026
Local
Parameter Value
CVSS 9.3 (CRITICAL)
Affected Versions before 2.3.0
Type CWE-829 (Inclusion of Functionality from Untrusted Source), CWE-426
Vendor Local
Public PoC No

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.

Attack Parameters

Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
High
Admin privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v4.0