CVE-2025-29843 Path traversal in Synology Router Manager (SRM)
Remote authenticated users can read or write image files via a path traversal vulnerability in FileStation thumb cgi on Synology Router Manager.
- 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-2025-29843?
CVE-2025-29843 is a medium-severity path traversal vulnerability in Synology Router Manager, published on 4 Dec 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability in FileStation thumb cgi allows remote authenticated users to read/write image files.
Weakness: CWE-22
Which versions are affected by CVE-2025-29843?
It affects 1 product.
Products include Synology Router Manager.
How do I fix CVE-2025-29843?
No fix has been published for CVE-2025-29843 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-2025-29843 being exploited?
There is no known exploitation of CVE-2025-29843 in the wild and no public exploit code.
Other vulnerabilities in Synology Router Manager
- CVE-2023-32956 Command injection in Synology Router Manager (SRM)
- CVE-2020-27654 Command injection in Synology Router Manager (SRM)
- CVE-2019-11823 Denial of service in Synology Router Manager (SRM)
- CVE-2020-27649 Security feature bypass in Synology Router Manager (SRM)
- CVE-2024-11398 Path traversal in Synology Router Manager (SRM)
Sources
Also known as GHSA-94rj-9gxp-vqv7.