SB2026041619 - Information disclosure in Synology DSM
Published: April 16, 2026
Security Bulletin ID
SB2026041619
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper access control (CVE-ID: CVE-2026-40540)
CWE-ID: CWE-284 - Improper Access Control
CVSSv4: 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
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.
Remediation
Install update from vendor's website.