Improper access control in DiskStation Manager (DSM) - CVE-2026-40540

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Main Vulnerability Database Vulnerabilities #VU126273

Improper access control in DiskStation Manager (DSM) - CVE-2026-40540

Published: April 16, 2026


Vulnerability identifier: #VU126273
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-40540
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Synology Inc.
Affected software:
DiskStation Manager (DSM)

Detailed vulnerability description

The vulnerability allows a remote user to obtain non-sensitive information.

The vulnerability exists due to improper access control in DiskStation Manager (DSM) when handling requests. A remote user can send crafted requests to obtain non-sensitive information.


How to mitigate CVE-2026-40540

Install security update from vendor's website.

Sources