🛡️ CVE-2025-66592 — active-backup-for-business-agent

🟡 CVSS 6.1 — Medium ✅ No Known Exploit CWE-346 NVD
6.1
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity low, availability high.

Weakness class

CVE-2025-66592 is classified as CWE-346: Origin Validation Error. The origin of a message or request is not verified properly, so one source can pose as another.

Affected software

CVE-2025-66592 is recorded against 2 packages.

  • active-backup-for-business-agent (fixed in 3.1.0-4967)
  • unknown

Timeline and source

Published on 27 May 2026 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

www.synology.com

Details

Severity MEDIUM
CVSS Score 6.1
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
CWE CWE-346
Public Exploit ✅ No
Source NVD
Published 2026-05-27
Updated 2026-08-11
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
active-backup-for-business-agent — 3.1.0-4967
unknown — —

Similar Threats

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