CVE-2026-27928
Received Received - Intake
Improper Input Validation in Windows Hello Enables Remote Bypass

Publication date: 2026-04-14

Last updated on: 2026-04-22

Assigner: Microsoft Corporation

Description
Improper input validation in Windows Hello allows an unauthorized attacker to bypass a security feature over a network.
CVSS Scores
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Meta Information
Published
2026-04-14
Last Modified
2026-04-22
Generated
2026-06-16
AI Q&A
2026-04-14
EPSS Evaluated
2026-06-15
NVD
CVE-2026-27928
EUVD
EUVD-2026-22481
Affected Vendors & Products
Showing 5 associated CPEs
Vendor Product Version / Range
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)
microsoft windows_server_2022_23h2 to 10.0.25398.2274 (exc)
microsoft windows_server_2025 to 10.0.26100.32690 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-20 The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
Attack-Flow Graph
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Executive Summary

This vulnerability involves improper input validation in Windows Hello, a Microsoft authentication feature. It allows an unauthorized attacker to bypass a security feature remotely over a network.

Impact Analysis

The vulnerability can allow an attacker to bypass security controls without proper authorization, potentially leading to unauthorized access to sensitive information or systems. Given the high CVSS score of 8.7, it poses a significant risk to confidentiality and integrity.

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