Origin validation error in Synology Assistant
Priority LOW 26CWE-346Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · Low · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-346.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00086 0th percentileScored 2026-11-07
Fix Fixed Synology Assistant (Synology): 7.0.6-50085
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA Synology Assistant (Synology) Fixed in 7.0.6-50085
Timeline
- 2026-10-02 Threatist record created from CVE-2025-66593
- 2026-10-03 Alias added: GHSA-43p3-6ww8-9fwv
References
Advisory 1
More Synology Assistant vulnerabilities
- TI-2017-08217 Multiple untrusted search path vulnerabilities in installer in Synology Assistant before… CVSS 3.0HIGH 7.8
- TI-2026-04180 Incorrect default permissions in Synology Assistant CVSS 3.1HIGH 7.3
Sources
- CVE-2025-66593 · CVE Program
- CVE-2025-66593 · NVD
- FIRST EPSS
- GHSA-43p3-6ww8-9fwv · GitHub Advisory Database · CC BY 4.0
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