CVE-2025-66593

Published May 27, 2026 CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed
Description
An origin validation error vulnerability in Synology Assistant before 7.0.6-50085 allows local users to write arbitrary files with restricted content and conduct denial-of-service during installation.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Title Local User Arbitrary File Write via Origin Validation Error in Synology Assistant
Type Values Removed Values Added
Description An origin validation error vulnerability in Synology Assistant before 7.0.6-50085 allows local users to write arbitrary files with restricted content during installation. An origin validation error vulnerability in Synology Assistant before 7.0.6-50085 allows local users to write arbitrary files with restricted content and conduct denial-of-service during installation.
Type Values Removed Values Added
CPEs cpe:2.3:a:synology:assistant:*:*:*:*:*:*:*:*
Type Values Removed Values Added
First Time appeared Synology
Synology assistant
Vendors & Products Synology
Synology assistant
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title Local User Arbitrary File Write via Origin Validation Error in Synology Assistant
Type Values Removed Values Added
Description An origin validation error vulnerability in Synology Assistant before 7.0.6-50085 allows local users to write arbitrary files with restricted content during installation.
Weaknesses CWE-346
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
synology
Published
Updated
Jun 2, 2026, 8:21 AM
Reserved
Dec 5, 2025, 3:19 AM
Status
Analyzed
Published
May 27, 2026, 9:16 AM
Modified
Oct 7, 2026, 8:10 AM