CVE-2026-40534 PUBLISHED

Assigner: synology
Reserved: 14.04.2026 Published: 18.09.2026 Updated: 18.09.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CVSS Score: 5.4

Attack Vector	Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	Low
Privileges Required	Low	Integrity Impact	Low
User Interaction	Required	Availability Impact	None

CVSS 3.1

Product Status

Vendor	Synology
Product	DiskStation Manager (DSM)
Versions	Default: affected affected from 7.3 to 7.3.2-86009-2 (excl.) affected from 7.2.2 to 7.2.2-72806-7 (excl.) affected from 7.2.1 to 7.2.1-69057-10 (excl.) unknown from 0 to 7.2.1 (excl.)

Credits

HE JIASHENG finder

References

Synology-SA-26:06 DSM

Problem Types

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') CWE