Missing Authorization Vulnerability in Synology DiskStation Manager
CVE-2026-19833

5.4MEDIUM

Key Information:

Vendor

Synology
Status
Diskstation Manager (dsm)
Vendor
CVE Published:
12 November 2026

What is CVE-2026-19833?

A missing authorization vulnerability in the ACL API of Synology DiskStation Manager (DSM) allows remote authenticated users to gain unauthorized access to sensitive files. This flaw exists in DSM versions prior to 7.3.2-86009-5 and 7.4.1-90080-1, posing a significant risk to data integrity and confidentiality. Users are advised to update their systems to ensure protection against potential exploitation.

Affected Version(s)

DiskStation Manager (DSM) 7.4.1

DiskStation Manager (DSM) 7.4.1 < 7.4.1-90080-1

DiskStation Manager (DSM) 7.3.2 < 7.3.2-86009-5

References

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

CVSS V3.1

Score:
5.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Warisse Valentin (Aytio)
.