Origin Validation Error in Synology Assistant Affects Local Users
CVE-2025-66593

6.1MEDIUM

Key Information:

Vendor

Synology
Status
Synology Assistant
Vendor
CVE Published:
27 May 2026

What is CVE-2025-66593?

An origin validation error in Synology Assistant prior to version 7.0.6-50085 enables local users to write arbitrary content files during the installation process. This vulnerability raises security concerns as it allows unauthorized file manipulation, potentially leading to further exploitation.

Affected Version(s)

Synology Assistant *

References

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

CVSS V3.1

Score:
6.1
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Sheikh Rishad (https://x.com/sheikhrishad0)
.