Synology Router Manager up to 1.3.1-9346-11 VideoPlayer2 Subtitle CGI path traversal

Summaryinfo

A vulnerability categorized as critical has been discovered in Synology Router Manager. This affects an unknown function of the component VideoPlayer2 Subtitle CGI. Executing a manipulation can lead to path traversal. This vulnerability is tracked as CVE-2025-29845. The attack can be launched remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Synology Router Manager. This vulnerability affects an unknown functionality of the component VideoPlayer2 Subtitle CGI. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality. CVE summarizes:

A vulnerability in VideoPlayer2 subtitle cgi allows remote authenticated users to read .srt files.

The weakness was disclosed by Qian Chen as SA_25_04. The advisory is available at synology.com. This vulnerability was named CVE-2025-29845 since 03/12/2025. The exploitation appears to be easy. The attack can be initiated remotely. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

Upgrading to version 1.3.1-9346-13 eliminates this vulnerability.

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Productinfo

Type

• Router Operating System

Vendor

• Synology

Name

• Router Manager

Version

• 1.1.4-6509
• 1.1.5-6542-4
• 1.1.6-6931
• 1.1.7-6941
• 1.1.7-6941-1
• 1.1.7-6941-2
• 1.2.3-8017-2
• 1.2.4-8081
• 1.2.5-8227-6
• 1.2.5-8227-11
• 1.3
• 1.3.1-9346-3
• 1.3.1-9346-6
• 1.3.1-9346-8
• 1.3.1-9346-9
• 1.3.1-9346-10
• 1.3.1-9346-11

License

• commercial

Website

• Vendor: https://www.synology.com/

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