PT-2026-48005 · Microsoft · Windows 10 Version 21H2+7

Published 2026-06-09 · Updated 2026-06-09 · CVE-2026-45641

Mitre

CVSS v3.1

8.4

High

Base vector

AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Out-of-bounds read in Windows Hyper-V allows an unauthorized attacker to execute code locally.

Fix

Type Confusion

Weakness Enumeration

CWE-843

Related Identifiers

CVE-2026-45641

Affected Products

Windows 10 Version 21H2

Windows 10 Version 22H2

Windows 11 Version 23H2

Windows 11 Version 24H2

Windows 11 Version 25H2

Windows 11 Version 26H1

Windows Server 2022

Windows Server 2025

References · 2

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45641 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-45641 · Security Note