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 673 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 | – | 673 days left | EOL 30 Jun 28 |
| 7.3LTS | – | 796 days left | EOL 31 Oct 28 |
| 7.2 | – | 239 days ago | End of Life |
| 7.1LTS | – | 423 days ago | End of Life |
| 7.0 | – | 1154 days ago | End of Life |
| 6.2LTS | – | 696 days ago | End of Life |
| 6.1 | – | 2615 days ago | End of Life |
| 6.0 | – | 2980 days ago | End of Life |
| 5.2LTS | – | 2615 days ago | End of Life |
| 5.1 | – | 3526 days ago | End of Life |
| 5.0 | – | 3710 days ago | End of Life |
| 4.3 | – | 3892 days ago | End of Life |
| 4.2LTS | – | 3345 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.
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