CVE-2026-40535 PUBLISHED

Assigner: synology
Reserved: 14.04.2026 Published: 18.09.2026 Updated: 18.09.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
CVSS Score: 6.5

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	Low
User Interaction	None	Availability Impact	Low

CVSS 3.1

Product Status

Vendor	Synology
Product	DiskStation Manager (DSM)
Versions	Default: affected affected from 7.3 to 7.3.2-86009-2 (excl.) affected from 7.2.2 to 7.2.2-72806-7 (excl.) affected from 7.2.1 to 7.2.1-69057-10 (excl.) unknown from 0 to 7.2.1 (excl.)

Credits

Warisse Valentin (Aytio) finder

References

Synology-SA-26:06 DSM

Problem Types

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') CWE