CVE-2025-66593: Origin Validation Error in Synology Synology Assistant
CVE-2025-66593 is a medium severity vulnerability in Synology Assistant before version 7. 0. 6-50085. It involves an origin validation error that allows local users to write arbitrary files with restricted content during the installation process. The vulnerability does not impact confidentiality but can affect integrity and availability. There is no confirmed patch or official remediation information available at this time. No known exploits are reported in the wild. Users should monitor vendor advisories for updates and apply any official fixes once released.
AI Analysis
Technical Summary
This vulnerability in Synology Assistant arises from improper origin validation during installation, enabling local users to write arbitrary files with restricted content. It affects versions prior to 7.0.6-50085. The CVSS 3.1 base score is 6.1, reflecting a medium severity with local attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, no confidentiality impact, low integrity impact, and high availability impact. No patch or remediation level has been confirmed by the vendor, and no exploits are currently known.
Potential Impact
The vulnerability allows local users to write arbitrary files during installation, which can lead to integrity compromise and potentially disrupt system availability. Confidentiality is not impacted. Since the attack requires local access and user interaction, the risk is limited to scenarios where an attacker has local presence and can initiate installation.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict local access to trusted users only and avoid running installation processes from untrusted sources. Monitor Synology's official channels for updates regarding patches or mitigations.
CVE-2025-66593: Origin Validation Error in Synology Synology Assistant
Description
CVE-2025-66593 is a medium severity vulnerability in Synology Assistant before version 7. 0. 6-50085. It involves an origin validation error that allows local users to write arbitrary files with restricted content during the installation process. The vulnerability does not impact confidentiality but can affect integrity and availability. There is no confirmed patch or official remediation information available at this time. No known exploits are reported in the wild. Users should monitor vendor advisories for updates and apply any official fixes once released.
CVSS v3.1
Score 6.1medium
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Synology Assistant arises from improper origin validation during installation, enabling local users to write arbitrary files with restricted content. It affects versions prior to 7.0.6-50085. The CVSS 3.1 base score is 6.1, reflecting a medium severity with local attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, no confidentiality impact, low integrity impact, and high availability impact. No patch or remediation level has been confirmed by the vendor, and no exploits are currently known.
Potential Impact
The vulnerability allows local users to write arbitrary files during installation, which can lead to integrity compromise and potentially disrupt system availability. Confidentiality is not impacted. Since the attack requires local access and user interaction, the risk is limited to scenarios where an attacker has local presence and can initiate installation.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict local access to trusted users only and avoid running installation processes from untrusted sources. Monitor Synology's official channels for updates regarding patches or mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- synology
- Date Reserved
- 2025-12-05T03:19:16.761Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a16b387e29bf47b50abe5d6
Added to database: 5/27/2026, 9:04:07 AM
Last enriched: 5/27/2026, 9:34:07 AM
Last updated: 5/27/2026, 10:28:11 AM
Views: 3
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.