Synology DSM Update Version 7.3.1-86003
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Update Summary
DSM 7.3.1-86003 (2025-10-28) adds quality fixes and requires a restart. After installing, you cannot downgrade to a previous DSM version, and Replication Service may be updated automatically or require a compatible manual update.
Update Details
Bug Fixes
- Fixed an issue where LED brightness adjustment might stop working on certain models.
- Fixed an issue where connected external devices might not appear when selecting files or folders.
- Fixed an issue where external storage devices might trigger false alerts.
- Fixed an issue where a USB-connected UPS might fail to function after a system update.
Hints
- This update restarts the Synology NAS.
- After installing this update, downgrading to a previous DSM version is not possible.
- If auto update does not run, perform a manual update in Control Panel.
- Before updating, follow the instructions and complete the required actions to ensure success.
- This version is released in a staged rollout.
- Some listed models will not receive this update through notifications and can only download the upgrade patch from Synology Download Center.
- Replication Service will be automatically updated or may require a manual update to a compatible version.
Product Information
Vendor: Synology
Product: DSM
Product type: Other
Platform: Linux
Version: 7.3.1-86003
Vendor release date: Oct 28, 2025
Original release notes: View on vendor site
Published on updatealert.io: Jun 3, 2026
Description: Operating system and management software for Synology NAS devices.