CVE-2026-27928: CWE-20: Improper Input Validation in Microsoft Windows Server 2016
Improper input validation in Windows Hello allows an unauthorized attacker to bypass a security feature over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-27928) is caused by improper input validation in the Windows Hello component of Microsoft Windows Server 2016 (version 10.0.14393.0). It enables an attacker without privileges or user interaction to bypass security features remotely. The CVSS v3.1 base score is 8.7, indicating high impact on confidentiality and integrity. Microsoft has published an official fix to remediate this vulnerability.
Potential Impact
Successful exploitation allows an attacker to bypass security features remotely without user interaction or privileges, potentially leading to compromise of sensitive information or unauthorized system access. The impact on confidentiality and integrity is high, while availability is not affected.
Mitigation Recommendations
An official fix is available from Microsoft. Administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27928 to remediate this vulnerability.
CVE-2026-27928: CWE-20: Improper Input Validation in Microsoft Windows Server 2016
Description
Improper input validation in Windows Hello allows an unauthorized attacker to bypass a security feature over a network.
CVSS v3.1
Score 8.7high
Affected software
Microsoft
Windows Server 2016
Microsoft
Windows Server 2016 (Server Core installation)
Microsoft
Windows Server 2019
Microsoft
Windows Server 2019 (Server Core installation)
Microsoft
Windows Server 2022
Microsoft
Windows Server 2022, 23H2 Edition (Server Core installation)
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-27928) is caused by improper input validation in the Windows Hello component of Microsoft Windows Server 2016 (version 10.0.14393.0). It enables an attacker without privileges or user interaction to bypass security features remotely. The CVSS v3.1 base score is 8.7, indicating high impact on confidentiality and integrity. Microsoft has published an official fix to remediate this vulnerability.
Potential Impact
Successful exploitation allows an attacker to bypass security features remotely without user interaction or privileges, potentially leading to compromise of sensitive information or unauthorized system access. The impact on confidentiality and integrity is high, while availability is not affected.
Mitigation Recommendations
An official fix is available from Microsoft. Administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27928 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-02-24T21:35:49.688Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27928","vendor":"Microsoft"}]
Threat ID: 69de7a2482d89c981fd6ba05
Added to database: 04/14/2026, 17:32:20 UTC
Last enriched: 08/15/2026, 13:59:12 UTC
Last updated: 09/14/2026, 22:01:33 UTC
Views: 142
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