CVE-2025-66592

Medium

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.

SeverityMedium

CVSS6.1

Exploit probability—

ProductSynology Active Backup For Business Agent

PublishedMay 27, 2026

First seenMay 27, 2026

Weakness typeCWE-346CWE-346

How to fix

Update

synology active_backup_for_business_agent3.1.0-4967 or later

Vendor advisories

synology.com/en-global/security/advisory/Synology_SA_25_16

Affected products

Product	Affected versions	Fixed in
synology active_backup_for_business_agent	v < 3.1.0-4967	3.1.0-4967

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