CVE-2020-27656: Synology Diskstation Manager

Low severity, CVSS 3.7. EPSS: 0.5% chance of exploitation in the next 30 days.

Cleartext transmission of sensitive information vulnerability in DDNS in Synology DiskStation Manager (DSM) before 6.2.3-25426-2 allows man-in-the-middle attackers to eavesdrop authentication information of DNSExit via unspecified vectors.

Affected products

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

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