Umbraco CMS 16 End of Life
Support dates and upgrade guidance — rebuilt from live data.
Umbraco CMS 16 reached end of life on 12 Jun 2026. It no longer receives security fixes.
Support timeline
Official dates from the Umbraco CMS release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 12 Jun 2025 | — |
| End of life | 12 Jun 2026 | 0.2 years ago |
| Active support ended | 12 Mar 2026 | security fixes only after this |
| Latest release | 16.5.1 · 10 Mar 2026 | final |
Where to go from 16
Recommended target: Umbraco CMS 18 (supported until 25 Jun 2027).
The newest actively supported branch is Umbraco CMS 18 (latest release 18.1.0).
Frequently asked questions
Is Umbraco CMS 16 still safe to use?
Umbraco CMS 16 reached end of life on 12 Jun 2026, 58 days ago, and is no longer covered by standard support. Running it means no guaranteed security fixes.
Can I still download Umbraco CMS 16?
Yes — the final release (16.5.1) generally remains available from vendor archives and OS package mirrors, but installing it means running software with known, unpatched vulnerabilities.
What should I upgrade Umbraco CMS 16 to?
Upgrade to Umbraco CMS 18, the newest actively supported branch (supported until 25 Jun 2027).