Path Traversal Vulnerability in Synology DiskStation Manager
CVE-2026-40535

6.5MEDIUM

Key Information:

Vendor

Synology
Status
Diskstation Manager (dsm)
Vendor
CVE Published:
18 September 2026

What is CVE-2026-40535?

A path traversal vulnerability exists in the Desktop API of Synology DiskStation Manager, allowing unauthorized remote access to write files in restricted directories. This flaw can be exploited by remote attackers to perform specific limitations on file access and potentially launch limited denial-of-service attacks, impacting system availability and integrity.

Affected Version(s)

DiskStation Manager (DSM) 7.3

DiskStation Manager (DSM) 7.3 < 7.3.2-86009-2

DiskStation Manager (DSM) 7.2.2 < 7.2.2-72806-7

References

https://www.synology.com/en-global/security/advisory/Syno...
vendor-advisory

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Warisse Valentin (Aytio)
.