KLA12037
Security vulnerability in Microsoft Apps

A security bypass vulnerability was found in Microsoft Apps. Malicious users can exploit this vulnerability to bypass security restrictions.

Windows 10 Version 1909 for ARM64-based Systems
Windows 10 Version 1809 for x64-based Systems
Windows 10 Version 20H2 for ARM64-based Systems
Windows Server, version 2004 (Server Core installation)
Windows 10 Version 1607 for 32-bit Systems
Windows 10 Version 1803 for 32-bit Systems
Microsoft Remote Desktop for Android
Windows 10 Version 1909 for 32-bit Systems
Windows Server, version 20H2 (Server Core Installation)
Windows 10 Version 1803 for x64-based Systems
Windows 10 Version 2004 for 32-bit Systems
Windows 10 Version 2004 for ARM64-based Systems
Windows Server 2019
Windows 10 Version 2004 for x64-based Systems
Windows Server, version 1909 (Server Core installation)
Windows Server 2016
Windows 10 Version 1809 for 32-bit Systems
Windows 10 Version 1809 for ARM64-based Systems
Windows 10 Version 1803 for ARM64-based Systems
Windows Server 2016 (Server Core installation)
Windows 10 Version 1607 for x64-based Systems
Windows 10 Version 20H2 for 32-bit Systems
Windows 10 for 32-bit Systems
Windows 10 Version 20H2 for x64-based Systems
Windows 10 for x64-based Systems
Microsoft Remote Desktop
Remote Desktop client for Windows Desktop
Windows 10 Version 1909 for x64-based 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)

CVE-2021-1669