Use After Free in Microsoft 365 Apps
CVE-2025-26630
Use after free in Microsoft Office Access allows an unauthorized attacker to execute code locally.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.010 (61.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 61.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: +0.000
Affected products
- Microsoft 365 Apps
- Microsoft Access — versions 2016
- Microsoft 365 Apps For Enterprise — versions 16.0.1
- Microsoft Access 2016 — versions 16.0.0
- Microsoft Access 2016 (32-Bit Edition) — 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 2019
- Microsoft Office Long Term Servicing Channel — versions 2021, 2024
Weakness classification (CWE)
References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2025-26630 (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-26630?
- CVE-2025-26630 is a high-severity vulnerability in Microsoft 365 Apps, classified under Use After Free. CVSS score: 7.8/10. Published 2025-03-11.
- How severe is CVE-2025-26630?
- High severity. CVSS v3 base score is 7.8 out of 10.