CVE-2026-40535: Synology Diskstation Manager Dsm

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

An improper limitation of a pathname to a restricted directory ('path traversal') vulnerability in Desktop API in Synology DiskStation Manager (DSM) before 7.2.1-69057-10, 7.2.2-72806-7 and 7.3.2-86009-2 allows remote attackers to write limited files and conduct limited denial-of-service attacks.

Affected products

• Synology Diskstation Manager Dsm: from 7.3, before 7.3.2-86009-2 (fixed in 7.3.2-86009-2); from 7.2.2, before 7.2.2-72806-7 (fixed in 7.2.2-72806-7); from 7.2.1, before 7.2.1-69057-10 (fixed in 7.2.1-69057-10)

Published 2026-09-18. Last modified 2026-09-18.