CVE-2026-0390
Received Received - Intake
Security Bypass via Untrusted Input in Windows Boot Loader

Publication date: 2026-04-14

Last updated on: 2026-04-24

Assigner: Microsoft Corporation

Description
Reliance on untrusted inputs in a security decision in Windows Boot Loader allows an authorized attacker to bypass a security feature locally.
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Meta Information
Published
2026-04-14
Last Modified
2026-04-24
Generated
2026-06-16
AI Q&A
2026-04-14
EPSS Evaluated
2026-06-15
NVD
CVE-2026-0390
EUVD
EUVD-2026-22350
Affected Vendors & Products
Showing 13 associated CPEs
Vendor Product Version / Range
microsoft windows_10_1607 to 10.0.14393.9060 (exc)
microsoft windows_10_1607 to 10.0.14393.9060 (exc)
microsoft windows_10_1809 to 10.0.17763.8644 (exc)
microsoft windows_10_1809 to 10.0.17763.8644 (exc)
microsoft windows_10_21h2 to 10.0.19044.7184 (exc)
microsoft windows_10_21h2 to 10.0.19044.7184 (exc)
microsoft windows_10_21h2 to 10.0.19044.7184 (exc)
microsoft windows_10_22h2 to 10.0.19045.7184 (exc)
microsoft windows_10_22h2 to 10.0.19045.7184 (exc)
microsoft windows_10_22h2 to 10.0.19045.7184 (exc)
microsoft windows_server_2016 to 10.0.14393.9060 (exc)
microsoft windows_server_2019 to 10.0.17763.8644 (exc)
microsoft windows_server_2022 to 10.0.20348.5020 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-807 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.
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Executive Summary

This vulnerability involves the Windows Boot Loader relying on untrusted inputs when making a security decision. Because of this, an authorized attacker who has local access can bypass a security feature.

Impact Analysis

The vulnerability allows an authorized local attacker to bypass a security feature in the Windows Boot Loader. This can lead to a compromise of confidentiality, integrity, and availability of the affected system.

Compliance Impact

The provided information does not specify how this vulnerability affects compliance with common standards and regulations such as GDPR or HIPAA.

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