KLA15721
Multiple vulnerabilities in Microsoft Windows

Multiple vulnerabilities were found in Microsoft Windows. Malicious users can exploit these vulnerabilities to bypass security restrictions, gain privileges.

Below is a complete list of vulnerabilities:

1. A security feature bypass vulnerability in Windows Defender Credential Guard can be exploited remotely to bypass security restrictions.
2. An elevation of privilege vulnerability in Windows Defender Credential Guard can be exploited remotely to gain privileges.

Windows Server, version 20H2 (Server Core Installation)
Windows 10 for x64-based Systems
Windows 10 Version 21H1 for 32-bit Systems
Windows 11 for x64-based Systems
Windows 10 Version 1809 for x64-based Systems
Windows 10 Version 1607 for x64-based Systems
Windows 10 Version 20H2 for ARM64-based Systems
Windows 10 for 32-bit Systems
Windows Server 2019
Windows Server 2019 (Server Core installation)
Windows 11 for ARM64-based Systems
Windows 10 Version 21H2 for 32-bit Systems
Windows 10 Version 1607 for 32-bit Systems
Windows Server 2022 (Server Core installation)
Windows Server 2016 (Server Core installation)
Windows Server 2016
Windows 10 Version 1809 for ARM64-based Systems
Windows 10 Version 20H2 for x64-based Systems
Windows 10 Version 21H2 for x64-based Systems
Windows 10 Version 21H2 for ARM64-based Systems
Windows Server 2022
Windows 10 Version 1809 for 32-bit Systems
Windows 10 Version 21H1 for ARM64-based Systems
Windows 10 Version 21H1 for x64-based Systems
Windows 10 Version 20H2 for 32-bit Systems

Install necessary updates from the KB section, that are listed in your Windows Update (Windows Update usually can be accessed from the Control Panel)

5016627
5016622
5016639
5016616
5016623
5016629