CVE-2025-4679

6.5 mediumEPSS 1.1%

Medium (6.5) in synology active backup for microsoft 365. EPSS 1.1% chance of exploitation in the next 30 days.

A vulnerability in Synology Active Backup for Microsoft 365 allows remote authenticated attackers to obtain sensitive information via unspecified vectors.

Severity

CVSS 3.1

6.5 medium

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS: 1.1% chance of exploitation in the next 30 days; higher than 65% of CVEs (scores of 2026-10-31)
CWE: CWE-522
Published: 2025-05-16
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

synology:active_backup_for_microsoft_365

References

https://www.synology.com/en-global/security/advisory/Synology_SA_25_06
https://modzero.com/en/blog/when-backups-open-backdoors-synology-active-backup-m365/
https://modzero.com/static/MZ-25-02_modzero_Synology-Active-Backup-M365.pdf

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