CVE-2026-0390

Published: Apr 14, 2026Modified: Jun 17, 2026

6.7

Vector

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

Exploitability: 0.8 / Impact: 5.9

Source: secure@microsoft.com (Secondary)

Description

Reliance on untrusted inputs in a security decision in Windows Boot Loader allows an authorized attacker to bypass a security feature locally.

Affected (13)

Products: Microsoft: Windows 10 1607, Windows 10 1809, Windows 10 21h2, Windows 10 22h2, Windows Server 2016, Windows Server 2019, Windows Server 2022

7 products

Windows 10 1607

Windows 10 1809

Windows 10 21h2

Windows 10 22h2

Windows Server 2016

Windows Server 2019

Windows Server 2022

Configuration A

13 vulnerable

Vulnerable Software	Affected Versions
Microsoft Windows 10 1607	Before 10.0.14393.9060
Microsoft Windows 10 1607	Before 10.0.14393.9060
Microsoft Windows 10 1809	Before 10.0.17763.8644
Microsoft Windows 10 1809	Before 10.0.17763.8644
Microsoft Windows 10 21h2	Before 10.0.19044.7184
Microsoft Windows 10 21h2	Before 10.0.19044.7184
Microsoft Windows 10 21h2	Before 10.0.19044.7184
Microsoft Windows 10 22h2	Before 10.0.19045.7184
Microsoft Windows 10 22h2	Before 10.0.19045.7184
Microsoft Windows 10 22h2	Before 10.0.19045.7184
Microsoft Windows Server 2016	Before 10.0.14393.9060
Microsoft Windows Server 2019	Before 10.0.17763.8644
Microsoft Windows Server 2022	Before 10.0.20348.5020

Related CWEs

Reliance on Untrusted Inputs in a Security Decision

The product uses a protection mechanism that relies on the existence or values of an input, but the input can be modified by an untrusted actor in a way that bypasses the protection mechanism.

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-0390

Source: secure@microsoft.com

Vendor Advisory

Timeline

No history available yet.