CVE-2020-27653: 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 Router Manager (SRM) before 1.2.4-8081 allows man-in-the-middle attackers to spoof servers and obtain sensitive information via unspecified vectors.

Affected products

• Synology Diskstation Manager: version 6.2.3_25426 only
• Synology Router Manager: from 1.2, before 1.2.4-8081 (fixed in 1.2.4-8081)

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