Use After Free in Microsoft 365_copilot
CVE-2025-26687
Use after free in Windows Win32K - GRFX allows an unauthorized attacker to elevate privileges over a network.
Vulnerability class: Use-After-Free
EPSS: 0.002 (44.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Microsoft 365_copilot
- Microsoft Office For Android — versions 16.0.1
- Microsoft Office For Universal — versions 16.0.1
- Microsoft Office
- Microsoft Windows_10_1507
- Microsoft Windows_10_1607
- Microsoft Windows_10_1809
- Microsoft Windows_10_21h2
- Microsoft Windows_10_22h2
- Microsoft Windows 10 Version 1507 — versions 10.0.10240.0
Weakness classification (CWE)
References
- secure@microsoft.com (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-26687?
- CVE-2025-26687 is a high-severity vulnerability in Microsoft 365_copilot, classified under Use After Free. CVSS score: 7.5/10. Published 2025-04-08.
- How severe is CVE-2025-26687?
- High severity. CVSS v3 base score is 7.5 out of 10.