CVE-2026-40402

critical Microsoft
CVSS v3 Base Score
9.3
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 Characteristics
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Published: May 12, 2026 (1 days ago)
Last Modified: May 13, 2026
Vendor: Microsoft
Source: MITRE

Description

Use after free in Windows Hyper-V allows an unauthorized attacker to elevate privileges locally.

CWE

CWE-416

Affected Products

Microsoft Windows 11 version 22H3Microsoft Windows 11 Version 23H2Microsoft Windows Server 2022

References

🔗 msrc.microsoft.com