Improper Authentication Attempt Restriction in Synology DiskStation Manager
CVE-2026-40538

3.7LOW

Key Information:

Vendor

Synology
Status
Diskstation Manager (dsm)
Vendor
CVE Published:
18 September 2026

What is CVE-2026-40538?

An improper restriction of excessive authentication attempts vulnerability in Synology DiskStation Manager could allow remote attackers to perform brute-force attacks, potentially accessing limited files on affected systems. Users are advised to update their DSM to the latest available version to mitigate this risk. More information can be found in the vendor advisory.

Affected Version(s)

DiskStation Manager (DSM) 7.3.2

DiskStation Manager (DSM) 7.3.2 < 7.3.2-86009-2

DiskStation Manager (DSM) 7.2.2 < 7.2.2-72806-7

References

https://www.synology.com/en-global/security/advisory/Syno...

CVSS V3.1

Score:
3.7
Severity:
LOW
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Andreas Rothenbacher (error401.de)
.