Is Checkmk 2.1 patched?
Current stable (2.5): 74/100
Summary iPlain-English security status for Checkmk 2.1, built from its CVEs, active-exploitation data, end-of-life date and latest release.
Checkmk 2.1 is part of the 2.1 release line. 5 known vulnerabilities affect it. The 2.1 line reached end-of-life on 2024-11-24, so it no longer receives security patches. The latest supported Checkmk release is 2.5.
Known issues affecting 2.1
Exploited first, then by exploitation probability.
CVE-2025-39664 MEDIUM EPSS 1% → fixed in 2.2.0 CVE-2025-39663 HIGH EPSS 1% → fixed in 2.3.0 CVE-2025-32919 HIGH EPSS 0% → fixed in 2.2.0 CVE-2025-32916 MEDIUM EPSS 0% → fixed in 2.2.0 CVE-2025-64996 MEDIUM EPSS 0% → fixed in 2.3.0Other Checkmk versions
Check another release line of Checkmk.
Frequently asked
Is Checkmk 2.1 patched?
Checkmk 2.1 is end-of-life and no longer receives security patches. Move to 2.5.
When does Checkmk 2.1 reach end-of-life?
Checkmk 2.1 reached end-of-life on 2024-11-24 and no longer receives security patches.
What is the latest version of Checkmk?
The latest supported Checkmk release is 2.5.
Is Checkmk 2.1 still receiving security updates?
No — Checkmk 2.1 is on the 2.1 line, which reached end-of-life on 2024-11-24 and no longer receives security updates. Upgrade to 2.5 or later to stay supported.
Informational only, from public data (NVD · CISA KEV · EPSS · endoflife.date), and can lag or miss vendor-specific fixes. Always confirm against Checkmk's official advisory before you patch or upgrade — Checkmk official site ↗