CVE-2025-4679

MEDIUMNVD 6.56.5—Trending — 3 sources updated this week

6.5

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

CVSS v3: 6.5
EG Score: 6.5(medium)
EPSS: 22.0%
KEV: Not listed

Published

May 16, 2025

Last Modified

July 2, 2025

References (3)

security@synologyhttps://www.synology.com/en-global/security/advisory/Synology_SA_25_06
af854a3a-2127-422b-91ae-364da2661108https://modzero.com/en/blog/when-backups-open-backdoors-synology-active-backup-m365/
af854a3a-2127-422b-91ae-364da2661108https://modzero.com/static/MZ-25-02_modzero_Synology-Active-Backup-M365.pdf

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-522Insufficiently Protected Credentials

Data Freshness Timeline

(refreshed 15× in last 7d / 15× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-05 06:10 UTCepss_batch
2026-06-05 06:10 UTCepss_batch
2026-06-04 13:12 UTCepss_batch
2026-06-04 13:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-30 05:12 UTCEG score recompute
2026-05-30 05:12 UTCGHSA enrichment
2026-05-29 13:44 UTCepss_batch

Frequently asked(5)

What is CVE-2025-4679?

CVE-2025-4679 is a medium vulnerability published on May 16, 2025. A vulnerability in Synology Active Backup for Microsoft 365 allows remote authenticated attackers to obtain sensitive information via unspecified vectors.

When was CVE-2025-4679 disclosed?

CVE-2025-4679 was first published in the National Vulnerability Database on May 16, 2025, with the most recent update on July 2, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-4679 actively exploited?

CVE-2025-4679 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 22.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-4679?

CVE-2025-4679 has a CVSS v3 base score of 6.5 (NVD).

How do I remediate CVE-2025-4679?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-4679, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2025-4679

📅 Published

🔄 Last Modified

🔗 References (3)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2025-4679?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (3)

Frequently asked(5)

Related CVEs(same CWE)