KLA12111
Multiple vulnerabilities in Microsoft Windows

Multiple vulnerabilities were found in Microsoft Windows. Malicious users can exploit these vulnerabilities to gain privileges, execute arbitrary code, cause denial of service, bypass security restrictions, obtain sensitive information.

Below is a complete list of vulnerabilities:

1. An elevation of privilege vulnerability in Windows UPnP Device Host can be exploited remotely to gain privileges.
2. A remote code execution vulnerability in OpenType Font Parsing can be exploited remotely to execute arbitrary code.
3. An elevation of privilege vulnerability in Windows Update Stack Setup can be exploited remotely to gain privileges.
4. An elevation of privilege vulnerability in Windows Win32k can be exploited remotely to gain privileges.
5. A remote code execution vulnerability in HEVC Video Extensions can be exploited remotely to execute arbitrary code.
6. An elevation of privilege vulnerability in Windows Update Service can be exploited remotely to gain privileges.
7. A denial of service vulnerability in User Profile Service can be exploited remotely to cause denial of service.
8. A security feature bypass vulnerability in Windows Admin Center can be exploited remotely to bypass security restrictions.
9. A denial of service vulnerability in Windows DNS Server can be exploited remotely to cause denial of service.
10. An elevation of privilege vulnerability in Windows Update Stack can be exploited remotely to gain privileges.
11. A remote code execution vulnerability in Application Virtualization can be exploited remotely to execute arbitrary code.
12. A remote code execution vulnerability in Windows DNS Server can be exploited remotely to execute arbitrary code.
13. An elevation of privilege vulnerability in Windows WalletService can be exploited remotely to gain privileges.
14. An information disclosure vulnerability in Windows Event Tracing can be exploited remotely to obtain sensitive information.
15. A security feature bypass vulnerability in Windows Extensible Firmware Interface can be exploited remotely to bypass security restrictions.
16. An elevation of privilege vulnerability in Windows Error Reporting can be exploited remotely to gain privileges.
17. An elevation of privilege vulnerability in DirectX can be exploited remotely to gain privileges.
18. An elevation of privilege vulnerability in Microsoft Windows Folder Redirection can be exploited remotely to gain privileges.
19. An elevation of privilege vulnerability in Windows Print Spooler can be exploited remotely to gain privileges.
20. An information disclosure vulnerability in Windows Media Photo Codec can be exploited remotely to obtain sensitive information.
21. An elevation of privilege vulnerability in Windows Event Tracing can be exploited remotely to gain privileges.
22. An elevation of privilege vulnerability in Windows Virtual Registry Provider can be exploited remotely to gain privileges.
23. An elevation of privilege vulnerability in Windows Container Execution Agent can be exploited remotely to gain privileges.
24. A remote code execution vulnerability in Windows Hyper-V can be exploited remotely to execute arbitrary code.
25. An elevation of privilege vulnerability in Windows 10 Update Assistant can be exploited remotely to gain privileges.
26. An information disclosure vulnerability in Windows ActiveX Installer Service can be exploited remotely to obtain sensitive information.
27. An elevation of privilege vulnerability in Windows Graphics Component can be exploited remotely to gain privileges.
28. An elevation of privilege vulnerability in Storage Spaces Controller can be exploited remotely to gain privileges.
29. A denial of service vulnerability in Windows NAT can be exploited remotely to cause denial of service.
30. An elevation of privilege vulnerability in Windows Projected File System can be exploited remotely to gain privileges.
31. A remote code execution vulnerability in Windows Graphics Component can be exploited remotely to execute arbitrary code.
32. A remote code execution vulnerability in Microsoft Windows Media Foundation can be exploited remotely to execute arbitrary code.
33. An elevation of privilege vulnerability in Remote Access API can be exploited remotely to gain privileges.
34. An elevation of privilege vulnerability in Windows App-V Overlay Filter can be exploited remotely to gain privileges.
35. An elevation of privilege vulnerability in Windows Installer can be exploited remotely to gain privileges.
36. An elevation of privilege vulnerability in Windows Overlay Filter can be exploited remotely to gain privileges.
37. An elevation of privilege vulnerability in Windows User Profile Service can be exploited remotely to gain privileges.

The following public exploits exists for this vulnerability:

https://github.com/sikkertech/CVE-2021-268855

https://github.com/taiji-xo/CVE-2021-26882

Malware exists for this vulnerability. Usually such malware is classified as Exploit. More details.

Windows Server 2012 R2
Windows Server, version 1909 (Server Core installation)
Windows 7 for 32-bit Systems Service Pack 1
Windows 10 Version 2004 for x64-based Systems
Windows RT 8.1
Windows 10 Version 1909 for ARM64-based Systems
Windows Admin Center
Windows 10 Version 20H2 for x64-based Systems
HEVC Video Extensions
Windows Server 2008 for x64-based Systems Service Pack 2
Windows Server, version 2004 (Server Core installation)
Windows Server 2016 (Server Core installation)
Windows 10 Version 2004 for ARM64-based Systems
Windows 7 for x64-based Systems Service Pack 1
Windows Server 2016
Windows 10 for 32-bit Systems
Windows 10 Version 1803 for x64-based Systems
Windows 8.1 for 32-bit systems
Windows Server 2008 for 32-bit Systems Service Pack 2
Windows 10 Version 1803 for ARM64-based Systems
Windows 10 Version 1607 for 32-bit Systems
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
Windows Server 2019
Windows 10 Version 20H2 for 32-bit Systems
Windows 10 Version 1809 for 32-bit Systems
Windows 10 Version 1909 for 32-bit Systems
Windows 10 Version 1909 for x64-based Systems
Windows 10 Version 1809 for x64-based Systems
Windows 8.1 for x64-based systems
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
Windows 10 Version 2004 for 32-bit Systems
Windows 10 Version 1803 for 32-bit Systems
Windows Server 2019 (Server Core installation)
Windows 10 for x64-based Systems
Windows Server 2012
Windows Server, version 20H2 (Server Core Installation)
Windows Server 2008 R2 for x64-based Systems Service Pack 1
Windows 10 Version 20H2 for ARM64-based Systems
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
Windows 10 Version 1809 for ARM64-based Systems
Windows 10 Version 1607 for x64-based Systems
Windows Server 2012 R2 (Server Core installation)
Windows Server 2012 (Server Core installation)

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

5000809
5000822
5000847
5000808
5000803
5000807
5000848
5000802
5000853
5000840