CVE-2021-29085: Synology Diskstation Manager

High severity, CVSS 7.5. EPSS: 1.3% chance of exploitation in the next 30 days.

Improper neutralization of special elements in output used by a downstream component ('Injection') vulnerability in file sharing management component in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows remote attackers to read arbitrary files via unspecified vectors.

Affected products

• Synology Diskstation Manager: from 6.2, before 6.2.3-25426-3 (fixed in 6.2.3-25426-3)
• Synology Diskstation Manager Unified Controller: before 3.1-23033 (fixed in 3.1-23033)

Published 2021-06-23. Last modified 2026-06-17.