AUGUST 4, 2026
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Case File

CVE-2021-40905

HIGH · CVSS 8.8 EPSS 2.81% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2022-03-25 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 8.8. Public exploit code or proof-of-concept references have been detected in its references. It may be remotely exploitable.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit remote code execution code execution
GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2021-40905
Severity
HIGH
CVSS
8.8
EPSS
2.81%

Original NVD Description

The web management console of CheckMK Enterprise Edition (versions 1.5.0 to 2.0.0p9) does not properly sanitise the uploading of ".mkp" files, which are Extension Packages, making remote code execution possible. Successful exploitation requires access to the web management interface, either with valid credentials or with a hijacked session of a user with administrator role. NOTE: the vendor states that this is the intended behavior: admins are supposed to be able to execute code in this manner.

Related CVEs

Other vulnerabilities affecting the same vendor(s)