CVE-2025-29843: Synology Router Manager

Medium severity, CVSS 5.4. EPSS: 0.4% chance of exploitation in the next 30 days.

A vulnerability in FileStation thumb cgi allows remote authenticated users to read/write image files.

Affected products

• Synology Router Manager: from 1.3, before 1.3.1-9346 (fixed in 1.3.1-9346); version 1.3.1-9346 only

Published 2025-12-04. Last modified 2026-09-25.