CVE-2026-45641
HighUpdated
Published: 09 June 2026
Published
09 June 2026
Modified
17 June 2026
KEV Added
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Patch
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CVSS Score v3.1
8.4
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score
0.0031
22.4th percentile
Summary
CVE-2026-45641 is a high-severity Type Confusion (CWE-843) vulnerability in Microsoft Windows 10 21H2. Its CVSS base score is 8.4 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 22.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-35687
Vulnerability details
Out-of-bounds read in Windows Hyper-V allows an unauthorized attacker to execute code locally.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
Why these techniques?
Out-of-bounds read in Hyper-V directly enables local code execution via exploitation, mapping to T1068 (Exploitation for Privilege Escalation).
Confidence: HIGH · MITRE ATT&CK Enterprise v19.0
Affected Assets
microsoft
windows 10 21h2
≤ 10.0.19044.7417
microsoft
windows 10 22h2
≤ 10.0.19045.7417
microsoft
windows 11 23h2
≤ 10.0.22631.7219
microsoft
windows 11 24h2
≤ 10.0.26100.8655
microsoft
windows 11 25h2
≤ 10.0.26200.8655
microsoft
windows 11 26h1
≤ 10.0.28000.2269
microsoft
windows server 2022
≤ 10.0.20348.5256
microsoft
windows server 2025
≤ 10.0.26100.32995
Mitigating Controls
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.