Summary iPlain-English security verdict for Checkmk, generated from its current health score, actively-exploited vulnerabilities, and latest supported version.
Checkmk currently scores 66/100 — needs attention. No tracked vulnerabilities are currently known to be exploited in the wild. The latest supported release is 2.5. Patch the open issues below when you can.
Disclosure trend iNew CVEs published for Checkmk each year (NVD). A higher bar means more disclosures that year — more scrutiny, not necessarily less safe.
Patch priority — what to act on iThe issues to fix first — actively exploited (CISA KEV) first, then by exploitation probability (EPSS), then severity. Each row's "→ fixed in" is the earliest version that patches it; "see advisory" means no fixed version is published.
No urgent unpatched issues identified. ✓
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Versions & lifecycle iWhen each release line stops receiving security patches (end-of-life). After EOL there are no more fixes — plan upgrades before these dates.
How long each Checkmk release line is supported — and when it sunsets. Select a line for its full report.
Full Checkmk end-of-life dates & support timeline →
2.5 latest 2.5 Supported until 2028-04-282.5 → 2.4 latest 2.4 Supported until 2027-11-062.4 → 2.3 latest 2.3 Supported until 2026-10-292.3 → 2.2 latest 2.2 End of life ended 2025-11-232.2 → 2.1 latest 2.1 End of life ended 2024-11-242.1 → 2.0 latest 2.0 End of life ended 2023-09-092.0 → See all upcoming end-of-life dates →Frequently asked
Is Checkmk safe and patched?
Checkmk currently scores 66/100 — needs attention. No tracked vulnerabilities are currently known to be exploited in the wild. The latest supported release is 2.5. Patch the open issues below when you can.
What should I do about Checkmk now?
Upgrade Checkmk to the latest supported release (2.5) or later and apply available security updates, then confirm against Checkmk's official advisory.
When does Checkmk reach end-of-life?
The latest supported Checkmk release is 2.5. After end-of-life a release no longer receives security patches.
Which versions of Checkmk are still receiving security updates?
Supported Checkmk release lines (latest 2.5): 2.5, 2.4, 2.3. End-of-life releases no longer receive security patches.
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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 ↗