Vulnerability in Microsoft 365 Apps
CVE-2025-21346
Microsoft Office Security Feature Bypass Vulnerability
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (50.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Microsoft 365 Apps
- Microsoft 365 Apps For Enterprise — versions 16.0.1
- Microsoft Office 2016 — versions 16.0.0
- Microsoft Office 2019 — versions 19.0.0
- Microsoft Office Ltsc 2021 — versions 16.0.1
- Microsoft Office Ltsc 2024 — versions 16.0.0
- Microsoft Office — versions 2016, 2019
- Microsoft Office Long Term Servicing Channel — versions 2021, 2024
Weakness classification (CWE)
References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21346 (vendor-advisory, Patch, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-21346?
- CVE-2025-21346 is a high-severity vulnerability in Microsoft 365 Apps, classified under Protection Mechanism Failure. CVSS score: 7.1/10. Published 2025-01-14.
- How severe is CVE-2025-21346?
- High severity. CVSS v3 base score is 7.1 out of 10.