CVE-2013-6955: Synology Diskstation Manager

High severity, CVSS 10.0. EPSS: 84.6% chance of exploitation in the next 30 days.

webman/imageSelector.cgi in Synology DiskStation Manager (DSM) 4.0 before 4.0-2259, 4.2 before 4.2-3243, and 4.3 before 4.3-3810 Update 1 allows remote attackers to append data to arbitrary files, and consequently execute arbitrary code, via a pathname in the SLICEUPLOAD X-TMP-FILE HTTP header.

Affected products

• Synology Diskstation Manager: version 4.0 only; version 4.2 only; version 4.3 only; version 4.3-3810 only

Published 2014-01-09. Last modified 2026-06-17.