On June 16, 2026, Synology released a new DSM version called DSM 7.4-90075. mariushosting was the first on the net to report the release of DSM 7.4 on May 24. Below I will guide you step by step through the process of installing the new DSM 7.4-90075. This update fixes a security vulnerability and multiple other issues.

📝DSM 7.4-90075 FULL CHANGELOG

• STEP 1

Manually Download DSM 7.4-90075 by following the blue link below. From the official Synology Archive, download DSM 7.4-90075 for your NAS model.

🚀DOWNLOAD DSM 7.4-90075

• 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.

• STEP 3

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

• STEP 4

After approximately 5 minutes your new DSM 7.4-90075 will be installed on your Synology NAS device.