CVE-2025-66592: Origin Validation Error in Synology Synology Active Backup for Business Agent
An origin validation error vulnerability in Synology Active Backup for Business Agent before 3.1.0-4967 allows local users to write arbitrary files with restricted content and conduct denial-of-service during installation.
AI Analysis
Technical Summary
This vulnerability in Synology Active Backup for Business Agent arises from improper origin validation, enabling local attackers to write arbitrary files with restricted content and cause denial-of-service conditions during the software installation process. It affects versions prior to 3.1.0-4967. The CVSS 3.1 vector (AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H) indicates that the attack requires local access with low complexity and user interaction, does not impact confidentiality, but can affect integrity and availability. No patch or official remediation level has been published by Synology as of the data available.
Potential Impact
Local users can exploit this vulnerability to write arbitrary files with restricted content, potentially compromising system integrity. Additionally, denial-of-service conditions may occur during installation, impacting availability. Confidentiality is not affected. There are no known active exploits in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict local user access to systems running vulnerable versions of Synology Active Backup for Business Agent and monitor installation processes for anomalies.
CVE-2025-66592: Origin Validation Error in Synology Synology Active Backup for Business Agent
Description
An origin validation error vulnerability in Synology Active Backup for Business Agent before 3.1.0-4967 allows local users to write arbitrary files with restricted content and conduct denial-of-service during installation.
CVSS v3.1
Score 6.1medium
Affected software
pkg:rpm/synology/active-backup-for-business-agentRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Synology Active Backup for Business Agent arises from improper origin validation, enabling local attackers to write arbitrary files with restricted content and cause denial-of-service conditions during the software installation process. It affects versions prior to 3.1.0-4967. The CVSS 3.1 vector (AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H) indicates that the attack requires local access with low complexity and user interaction, does not impact confidentiality, but can affect integrity and availability. No patch or official remediation level has been published by Synology as of the data available.
Potential Impact
Local users can exploit this vulnerability to write arbitrary files with restricted content, potentially compromising system integrity. Additionally, denial-of-service conditions may occur during installation, impacting availability. Confidentiality is not affected. There are no known active exploits in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict local user access to systems running vulnerable versions of Synology Active Backup for Business Agent and monitor installation processes for anomalies.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- synology
- Date Reserved
- 2025-12-05T03:19:16.760Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a16b387e29bf47b50abe5d3
Added to database: 05/27/2026, 09:04:07 UTC
Last enriched: 06/03/2026, 20:19:16 UTC
Last updated: 07/31/2026, 19:22:56 UTC
Views: 63
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