PT-2026-43590 · Synology · Active Backup For Business Agent

Sheikh Rishad · Published 2026-05-27 · Updated 2026-06-01 · CVE-2025-66592

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H

Name of the Vulnerable Software and Affected Versions Synology Active Backup for Business Agent versions prior to 3.1.0-4967

Description An origin validation error occurs during installation, which allows local users to write arbitrary files containing restricted content.

Recommendations Update to version 3.1.0-4967 or later.

Fix

Origin Validation Error

Weakness Enumeration

CWE-346

Related Identifiers

CVE-2025-66592

Affected Products

Active Backup For Business Agent

References · 3

• https://synology.com/en-global/security/advisory/Synology_SA_25_16 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-66592 · Security Note
• https://twitter.com/dailycve/status/2061594446123106689 · Twitter Post