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
Description
Improper input validation in Windows Hello allows an unauthorized attacker to bypass a security feature over a network.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| 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
KEV
| 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
AI Powered Q&A
Can you explain this vulnerability to me?
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.
How can this vulnerability impact me? :
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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