Checkmk 2.1 End of Life
Support dates and upgrade guidance — rebuilt from live data.
Checkmk 2.1 reached end of life on 24 Nov 2024. It no longer receives security fixes.
Support timeline
Official dates from the Checkmk release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 24 May 2022 | 4y 4mo ago |
| Security Support ended | 24 Nov 2024 | 1y 10mo ago |
| Latest release | 2.1 · 24 May 2022 | final |
Where to go from 2.1
Recommended target: Checkmk 2.5 (supported until 28 Apr 2028).
The newest actively supported branch is Checkmk 2.5 (latest release 2.5).
Frequently asked questions
Is Checkmk 2.1 still safe to use?
Checkmk 2.1 reached end of life on 24 Nov 2024, 680 days ago, and is no longer covered by standard support. Running it means no guaranteed security fixes.
Can I still download Checkmk 2.1?
Yes — the final release (2.1) generally remains available from vendor archives and OS package mirrors, but installing it means running software with known, unpatched vulnerabilities.
What should I upgrade Checkmk 2.1 to?
Upgrade to Checkmk 2.5, the newest actively supported branch (supported until 28 Apr 2028).