Vulnerability · Published May 27, 2026 · Assigned by synology
CVE-2025-66592
Medium 6.1
In plain English
A medium-severity security flaw in Synology Active Backup for Business Agent from Synology. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 0% of all known vulnerabilities).
Severity (CVSS 3.1)6.1Medium
Exploit odds (30 days)<0.1%top 99.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Synology | Synology Active Backup for Business Agent | * – before 3.1.0-4967 |
Weakness: CWE-346 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
References
- Synology-SA-25:16 Synology Active Backup for Business Agent vendor-advisory