CVE-2026-40536 Path traversal in DiskStation Manager (DSM)
Authenticated attackers can exploit a path traversal flaw in the Audio API to access non-sensitive information on Synology NAS devices.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-40536?
CVE-2026-40536 is a medium-severity path traversal vulnerability in Synology DiskStation Manager (DSM), published on 18 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An improper limitation of a pathname to a restricted directory ('path traversal') vulnerability in Audio 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 authenticated users to obtain non-sensitive information.
Weakness: CWE-22
Which versions are affected by CVE-2026-40536?
How do I fix CVE-2026-40536?
No fix has been published for CVE-2026-40536 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-40536 being exploited?
There is no known exploitation of CVE-2026-40536 in the wild and no public exploit code.
Sources
Also known as GHSA-p44h-mfjw-mpmg.