
On March 19, 2026, Synology released a new DSM version called DSM 7.3.2-86009 Update 3 (DSM 7.3.2-86009-3). Below I will guide you step by step through the process of installing the new DSM 7.3.2-86009-3. This update fixes a security vulnerability regarding Telnetd (CVE-2026-32746).
STEP 1
Manually Download DSM 7.3.2-86009 Update 3 by following the blue link below. From the official Synology Archive, download DSM 7.3.2-86009 Update 2 for your NAS model.
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 7.3.2-86009 Update 3 will be installed on your Synology NAS device.

This post was updated on Thursday / March 19th, 2026 at 10:19 AM