Vulnerability in Synology Active Backup For Microsoft 365
CVE-2025-4679
A vulnerability in Synology Active Backup for Microsoft 365 allows remote authenticated attackers to obtain sensitive information via unspecified vectors.
EPSS: 0.010 (59.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@synology.com (vendor-advisory, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2025-4679?
- CVE-2025-4679 is a medium-severity vulnerability in Synology Active Backup For Microsoft 365, classified under Insufficiently Protected Credentials. CVSS score: 6.5/10. Published 2025-05-16.
- How severe is CVE-2025-4679?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2025-4679 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.