Synology DSM 7.3.1-86003 released

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Synology DSM 7.3.1-86003 released

On October 28, 2025, Synology released a new DSM version called DSM 7.3.1-86003. Below I will guide you step by step through the process of installing the new DSM 7.3.1-86003. This update fixes an issue where the LED brightness adjustment function might stop working on certain models.

Container Manager “Docker engine” is still at the outdated version 24.0.2 so no news here yet.

📝FULL DSM 7.3.1-86003 FULL CHANGELOG

  • STEP 1

Manually Download DSM 7.3.1-86003 by following the blue link below. From the official Synology Archive, download 7.3.1-86003 for your NAS model.

🚀DOWNLOAD DSM 7.3.1-86003

  • STEP 2

Go to Control Panel / Update & Restore then click on Manual DSM Update. Select the file you have previously downloaded at STEP 1 then click OK. Follow the instructions in the image below.

Synology DSM 7.3.1-86003 Released 1

  • STEP 3

A new pop up window will open. Click OK. Follow the instructions in the image below.

Synology DSM 7.3.1-86003 Released 2

  • STEP 4

After approximately 5 minutes your new DSM 7.3.1-86003 will be installed on your Synology NAS device.

Synology DSM 7.3.1-86003 Released 3

This post was updated on Tuesday / October 28th, 2025 at 2:47 PM

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