CVE-2026-13684 Path traversal in DiskStation Manager (DSM)
Remote attackers can read or write arbitrary files and cause denial of service in Synology DSM due to improper output encoding in SCGI.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-13684?
CVE-2026-13684 is a critical path traversal vulnerability in Synology DiskStation Manager (DSM), published on 18 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An improper encoding or escaping of output vulnerability in SCGI in Synology DiskStation Manager (DSM) before 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4 and 7.4-90075 allows remote attackers to read or write arbitrary files and conduct denial-of-service attacks.
Weakness: CWE-116
Which versions are affected by CVE-2026-13684?
How do I fix CVE-2026-13684?
No fix has been published for CVE-2026-13684 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-2026-13684 being exploited?
There is no known exploitation of CVE-2026-13684 in the wild and no public exploit code.
Sources
Also known as GHSA-f4qf-hcj6-jwp9.