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NVD Vulnerability Details :
CVE-2026-40402
Analyzed
More InfoOfficial Page
Source-secure@microsoft.com
View Known Exploited Vulnerability (KEV) details
Published At-12 May, 2026 | 18:17
Updated At-15 May, 2026 | 15:23

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

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.19.3CRITICAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Type: Secondary
Version: 3.1
Base score: 9.3
Base severity: CRITICAL
Vector:
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CPE Matches
Microsoft Corporation
microsoft
>>windows_11_23h2>>Versions before 10.0.22631.7079(exclusive)
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:*
Microsoft Corporation
microsoft
>>windows_11_23h2>>Versions before 10.0.22631.7079(exclusive)
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:*
Microsoft Corporation
microsoft
>>windows_server_2022>>Versions before 10.0.20348.5074(exclusive)
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-416Primarysecure@microsoft.com
CWE ID: CWE-416
Type: Primary
Source: secure@microsoft.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40402secure@microsoft.com
Vendor Advisory
Hyperlink: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40402
Source: secure@microsoft.com
Resource:
Vendor Advisory
Change History
0Changes found
Details not found