Synology DSM end of life: end of support by version
Synology · NAS & Storage
For Synology DSM by Synology, patchletter knows 13 support cycles. 11 of them have already ended and receive no more security updates. The next support window closes on 30/06/2028, that is in 628 days. The current version of Synology DSM is 7.4-90075. The cycles come from the open endoflife.date project, last reconciled on 22/08/2026.
When does support end for which Synology DSM version?
A cycle is a maintained version line. Where a date is given, support ends on that day — after it the vendor ships no more security updates for that line.
| Cycle | Latest version | End of support | Status |
|---|---|---|---|
| 7.4 | – | 628 days left | EOL 30 Jun 28 |
| 7.3LTS | – | 751 days left | EOL 31 Oct 28 |
| 7.2 | – | 284 days ago | End of Life |
| 7.1LTS | – | 468 days ago | End of Life |
| 7.0 | – | 1199 days ago | End of Life |
| 6.2LTS | – | 741 days ago | End of Life |
| 6.1 | – | 2660 days ago | End of Life |
| 6.0 | – | 3025 days ago | End of Life |
| 5.2LTS | – | 2660 days ago | End of Life |
| 5.1 | – | 3571 days ago | End of Life |
| 5.0 | – | 3755 days ago | End of Life |
| 4.3 | – | 3937 days ago | End of Life |
| 4.2LTS | – | 3390 days ago | End of Life |
Which Synology DSM versions no longer receive security updates?
11 of 13 cycles have ended. If you run one of those lines, the vendor ships you no more patches — not even for critical flaws.
- Synology DSM 7.2
- Synology DSM 7.1
- Synology DSM 7.0
- Synology DSM 6.2
- Synology DSM 6.1
- Synology DSM 6.0
- Synology DSM 5.2
- Synology DSM 5.1
- Synology DSM 5.0
- Synology DSM 4.3
- Synology DSM 4.2
Where does the EOL data for Synology DSM come from?
From the open endoflife.date project, which collects vendors' official support commitments. patchletter reconciles the cycles daily; the Synology DSM data is as of 22/08/2026. In case of doubt the vendor's own lifecycle page applies — patchletter deliberately stores no vendor full texts.
New Synology DSM versions by email
Tick the product and patchletter reports new releases by email. The update email costs nothing, and one click stops it again. The warning 90, 30 and 7 days before support ends is part of patchletter Pro.