CVE-2025-39666 CRITICAL

CVE-2025-39666: omd: Local privilege escalation when executing omd commands as root

Vendor Checkmk Gmbh
Product Checkmk
Weakness CWE-426
Published April 7, 2026
Last update April 7, 2026
View on NVD All CVEs

CVSS base score

9.3/10
Attack vector Local
Attack complexity Low
Privileges required High
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 7, 2026 CVE published
April 7, 2026 Record updated