Input Neutralization Flaw in Synology DiskStation Manager
CVE-2026-81557

5.4MEDIUM

Key Information:

Vendor

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

What is CVE-2026-81557?

A vulnerability exists within the DSMNotify component of Synology DiskStation Manager that allows remote authenticated users to exploit improper input neutralization. This flaw can lead to unauthorized reading or writing of specific files, compromising the integrity and confidentiality of sensitive data. It affects versions prior to 7.3.2-86009-5 and 7.4.1-90080-1. For further details, visit the Synology security advisory.

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:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Lubin Leclanche
.