CVE-2026-24095Network attack vector

Unauthorized check changes via direct URL access

Published Feb 9, 2026 · Updated Feb 9, 2026

Missing authorization in Checkmk 2.4.0 before 2.4.0p21, 2.3.0 before 2.3.0p43, and 2.2.0 allows authenticated users to alter checks. The Analyze configuration page hides its menu link but accepts direct URL requests from accounts with Use WATO permission without enforcing Access analyze configuration. The default Normal monitoring user role can reach the page; Make changes, perform actions permission additionally enables check disabling and result acknowledgement.

CVSS severity5.3
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Checkmk 2.4.0 before 2.4.0p21, 2.3.0 before 2.3.0p43, and 2.2.0 allows authenticated users to alter checks. The Analyze configuration page hides its menu link but accepts direct URL requests from accounts with Use WATO permission without enforcing Access analyze configuration. The default Normal monitoring user role can reach the page; Make changes, perform actions permission additionally enables check disabling and result acknowledgement.

The record

CVE
CVE-2026-24095
Published
Feb 9, 2026
Updated
Feb 9, 2026
Vendor
Checkmk GmbH
Product
Checkmk
Classifications
CWE-862, T1562
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.2.0
  2. Affected versionversion=2.3.0 <2.3.0p43
  3. Affected versionversion=2.4.0 <2.4.0p21

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Checkmk GmbH · Checkmkversion=2.2.0; version=2.3.0 <2.3.0p43; version=2.4.0 <2.4.0p21

Published CVSS scores

5.3Checkmk GmbHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1562Impair Defenses

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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