CVE-2025-66592
Analyzed Analyzed - Analysis Complete
Origin Validation Error in Synology Active Backup for Business Agent

Publication date: 2026-05-27

Last updated on: 2026-06-02

Assigner: Synology Inc.

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.
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Meta Information
Published
2026-05-27
Last Modified
2026-06-02
Generated
2026-06-16
AI Q&A
2026-05-27
EPSS Evaluated
2026-06-15
NVD
CVE-2025-66592
EUVD
EUVD-2025-209962
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
synology active_backup_for_business_agent to 3.1.0-4967 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-346 The product does not properly verify that the source of data or communication is valid.
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Compliance Impact

The provided information does not specify how the vulnerability impacts compliance with common standards and regulations such as GDPR or HIPAA.

Executive Summary

This vulnerability is an origin validation error in Synology Active Backup for Business Agent versions before 3.1.0-4967. It allows local users to write arbitrary files with restricted content during the installation process.

Impact Analysis

The vulnerability can allow local users to write arbitrary files with restricted content, which may lead to unauthorized changes or damage to the system. It has a moderate severity with a CVSS base score of 6.1, indicating a significant impact, including potential high availability impact.

Mitigation Strategies

To mitigate this vulnerability, users are advised to upgrade the Synology Active Backup for Business Agent to version 3.1.0-4967 or later.

Detection Guidance

There are no specific detection methods or commands provided to identify this vulnerability on your network or system.

The recommended action is to verify the version of Synology Active Backup for Business Agent installed and ensure it is updated to version 3.1.0-4967 or later, as this update addresses the vulnerability.

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