#VU126271 Improper Restriction of Excessive Authentication Attempts in DiskStation Manager (DSM) - CVE-2026-40538
Published: April 16, 2026
Vulnerability identifier: #VU126271
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-40538
CWE-ID: CWE-307
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
DiskStation Manager (DSM)
DiskStation Manager (DSM)
Software vendor:
Synology Inc.
Synology Inc.
Description
The vulnerability allows a remote attacker to obtain non-sensitive information.
The vulnerability exists due to improper restriction of excessive authentication attempts in DSM when handling authentication attempts. A remote attacker can perform repeated authentication attempts to obtain non-sensitive information.
Remediation
Install security update from vendor's website.