CVE-2026-40402

FAUCET Score

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

First published: May 12, 2026Last modified: Jun 9, 2026

Impacted Technologies

Vendor	Product	Version(s)	CPE
		< 10.0.22631.7079CPE matchmatch criteria	cpe:2.3:o:microsoft:windows_11_23h2:::::::arm64:*
		< 10.0.22631.7079CPE matchmatch criteria	cpe:2.3:o:microsoft:windows_11_23h2:::::::x64:*
		< 10.0.20348.5074CPE matchmatch criteria	cpe:2.3:o:microsoft:windows_server_2022::::::::

CVSS version used by this source: 3.1

9.3CRITICAL

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 Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

Exploitability Score

2.5

Impact Score

6.0

CvssVersion

3.1

EPSS Score

0.33%

Probability of exploitation in next 30 days

EPSS Percentile

25.8%

Percentile rank of EPSS score among Peer Group

As of 2026-07-28

Model: v2026.06.15

This CVE's current EPSS score of 0.0033 is in the 78th percentile among its peer group of 79 CVEs.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.7 Bluesky, 0.3 Mastodon, and 1.0 GitHub mentions.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.