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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

Application category: Utilities

Platform: Linux

Version: 7.3.1-86003

Vendor release date: Oct 28, 2025

Published on updatealert.io: Jun 3, 2026

Description: Operating system and management software for Synology NAS devices.

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