CVE-2025-39666 | BDVDB-2026-325182 Detail

CheckmkCheckmk

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#

CAPEC-471: Search Order Hijacking

Weaknesses#

CWE-426 Untrusted Search Path
CWE-829 Inclusion of Functionality from Untrusted Control Sphere

References#

https://checkmk.com/werk/18891

Exploit#

No public exploit known

History#

Version 12026-04-07Record published in the CVE List.

Published

Published: 2026-04-07
Last modified: 2026-04-07

Vendor information

Vendor: Checkmk
Product: Checkmk

All Checkmk vulnerabilities

Score

9.3 Critical

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 2.1.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
2.2.0
Fixed
Not stated
Vulnerable
>= 2.3.0 and < 2.3.0p46
Fixed
2.3.0p46
Vulnerable
>= 2.4.0 and < 2.4.0p25
Fixed
2.4.0p25
Vulnerable
>= 2.5.0b1 and < 2.5.0b3
Fixed
2.5.0b3

Scoring System

CVSS v4.0

9.3 Critical

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

Metric breakdown
Attack Vector	Local
Attack Complexity	Low
Attack Requirements	None
Privileges Required	High
User Interaction	None
Vulnerable System Confidentiality	High
Vulnerable System Integrity	High
Vulnerable System Availability	High
Subsequent System Confidentiality	High
Subsequent System Integrity	High
Subsequent System Availability	High

CVSS v3.1

Not available

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).