CVE-2026-40402

CRITICAL EPSS 25.0%
Published May 12, 20261mo ago · Modified Jun 17, 20261w ago
9.3 CVSS 3.1
Critical
Find Similar
Published May 12, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago

Description

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

CVSS Details

Base Score
9.3
Exploitability
2.5
Impact
6.0
Vector string
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Changed
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
25.0% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 3

VendorProductVersionRange
microsoftwindows_11_23h2* <10.0.22631.7079
microsoftwindows_11_23h2* <10.0.22631.7079
microsoftwindows_server_2022* <10.0.20348.5074

References 1

  • msrc.microsoft.com https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40402
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.