CVE-2013-6955: webman/imageSelector.cgi in Synology DiskStation Manager (DSM) 4.0 before 4.0-2259, 4.2 before 4.2-3243, an...

Security readout for executives and security teams

This is a legacy Synology DiskStation Manager flaw that could let a remote attacker modify files and potentially run code on the NAS. The issue affects DSM 4.0, 4.2, and 4.3 builds before the fixed versions named in the CVE. Business urgency is highest where old DSM management interfaces remain reachable from untrusted networks. Exposure is most likely on Synology NAS devices running DSM 4.0 before 4.0-2259, 4.2 before 4.2-3243, or 4.3 before 4.3-3810 Update 1. Risk increases if DSM web management is reachable from the internet or shared administrative networks. Treat this as high priority for any legacy Synology NAS still in service. Remote code execution on storage appliances can affect sensitive data, backups, and internal network trust. If no affected DSM versions exist, priority drops to documentation and exposure hygiene. Mitigation focus: Upgrade affected DSM systems to the fixed versions or later.; Remove DSM web management exposure from the public internet.; Restrict administrative access to trusted networks or VPN paths..

Prepared

Jun 14, 2026, 14:50 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.