CVE-2020-27652: Synology Diskstation Manager

High severity, CVSS 8.3. EPSS: 0.8% chance of exploitation in the next 30 days.

Algorithm downgrade vulnerability in QuickConnect in Synology DiskStation Manager (DSM) before 6.2.3-25426-2 allows man-in-the-middle attackers to spoof servers and obtain sensitive information via unspecified vectors.

Affected products

• Synology Diskstation Manager: from 6.2, before 6.2.3-25426-2 (fixed in 6.2.3-25426-2)
• Synology Skynas Firmware: before 6.2.3-25426 (fixed in 6.2.3-25426)

Published 2020-10-29. Last modified 2026-06-17.