Path Traversal Vulnerability in Synology DiskStation Manager
CVE-2026-18792

8.8HIGH

Key Information:

Vendor

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

What is CVE-2026-18792?

An improper limitation of a pathname to a restricted directory vulnerability exists in the Sharing API of Synology DiskStation Manager. This flaw affects versions prior to 7.3.2-86009-5 and 7.4.1-90080-1, allowing remote authenticated users to manipulate file paths and gain unauthorized access to read or write arbitrary files. This vulnerability also opens up possibilities for denial-of-service attacks, posing significant risks to data integrity and availability.

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:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Adonis Ramos
.