CVE-2026-58638

Microsoft · Published July 14, 2026

6.0

CVSS v3.1

MEDIUM

Patch availableGet patch

Description

Windows Boot Loader Security Feature Bypass Vulnerability. Missing cryptographic step in Windows Boot Loader allows an authorized attacker to bypass a security feature locally.

Affected Products

Windows 10 Version 1809 for 32-bit Systems
Windows 10 Version 1809 for x64-based Systems
Windows Server 2019
Windows Server 2019 (Server Core installation)

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C