Synology DSM XSS in Video API before 7.3.2-86009-2
CVE-2026-40534 Published on September 18, 2026
An improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Video API in Synology DiskStation Manager (DSM) before 7.2.1-69057-10, 7.2.2-72806-7 and 7.3.2-86009-2 allows remote authenticated users to read or write limited files when the player is launched.
Vulnerability Analysis
CVE-2026-40534 is exploitable with network access, requires user interaction and a small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality and integrity, and no impact on availability.
Weakness Type
What is a XSS Vulnerability?
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CVE-2026-40534 has been classified to as a XSS vulnerability or weakness.
Products Associated with CVE-2026-40534
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Affected Versions
Synology DiskStation Manager (DSM):- Version 7.3 and below 7.3.2-86009-2 is affected.
- Version 7.2.2 and below 7.2.2-72806-7 is affected.
- Version 7.2.1 and below 7.2.1-69057-10 is affected.
- Before 7.2.1 is unknown.