PT-2026-48017 · Microsoft · Windows 10 Version 1607+13

Published 2026-06-09 · Updated 2026-06-09 · CVE-2026-45656

NVD

CVSS v3.1

7.8

High

Base vector

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

Protection mechanism failure in Windows UEFI allows an authorized attacker to bypass a security feature locally.

Fix

Protection Mechanism Failure

Weakness Enumeration

CWE-693

Related Identifiers

CVE-2026-45656

Affected Products

Windows 10 Version 1607

Windows 10 Version 1809

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 2012

Windows Server 2012 R2

Windows Server 2016

Windows Server 2019

Windows Server 2022

Windows Server 2025

References · 2

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45656 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-45656 · Security Note