Out-of-bounds Read in Microsoft Windows 10 21h2
CVE-2026-45641
Access of resource using incompatible type ('type confusion') in Windows Hyper-V allows an unauthorized attacker to execute code locally.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (24.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 24.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Microsoft Windows 10 21h2
- Microsoft Windows 10 22h2
- Microsoft Windows 10 Version 21h2 — versions 10.0.19044.0
- Microsoft Windows 10 Version 22h2 — versions 10.0.19045.0
- Microsoft Windows 11 23h2
- Microsoft Windows 11 24h2
- Microsoft Windows 11 25h2
- Microsoft Windows 11 26h1
- Microsoft Windows 11 Version 23h2 — versions 10.0.22631.0
- Microsoft Windows 11 Version 24h2 — versions 10.0.26100.0
Weakness classification (CWE)
References
- Windows Hyper-V Remote Code Execution Vulnerability (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-45641?
- CVE-2026-45641 is a high-severity vulnerability in Microsoft Windows 10 21h2, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 8.4/10. Published 2026-06-09.
- How severe is CVE-2026-45641?
- High severity. CVSS v3 base score is 8.4 out of 10.