Medium severity · published May 16, 2025
CVE-2025-4679
A vulnerability in Synology Active Backup for Microsoft 365 allows remote authenticated attackers to obtain sensitive information via unspecified vectors
6.5
CVSS
1.1%
EPSS
No
On KEV
Description
A vulnerability in Synology Active Backup for Microsoft 365 allows remote authenticated attackers to obtain sensitive information via unspecified vectors.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.1% · higher than 65% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AB
Active Backup For Microsoft 365 · Synology
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-4679
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-4679
Vendor Advisory
https://www.synology.com/en-global/security/advisory/Synology_SA_25_06
modzero.com
https://modzero.com/en/blog/when-backups-open-backdoors-synology-active-backup-m365/
modzero.com
https://modzero.com/static/MZ-25-02_modzero_Synology-Active-Backup-M365.pdf