CVE-2026-40402
Windows Hyper-V Elevation of Privilege Vulnerability
CVSS Score
9.3
EPSS Score
0.0%
EPSS Percentile
0th
Use after free in Windows Hyper-V allows an unauthorized attacker to elevate privileges locally.
| Vendor | microsoft |
| Product | windows 11 version 22h3 |
| Ecosystems | |
| Industries | TechnologyEnterprise |
| Published | May 12, 2026 |
| Last Updated | May 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Microsoft / Windows 11 version 22H3
10.0.22631.0 < 10.0.22631.7079
Microsoft / Windows 11 Version 23H2
10.0.22631.0 < 10.0.22631.7079
Microsoft / Windows Server 2022
10.0.20348.0 < 10.0.20348.5139