Multiple vulnerabilities were fixed in Microsoft Extended Security Updates. Malicious users can exploit these vulnerabilities to gain privileges, obtain sensitive information, execute arbitrary code.

Below is a complete list of vulnerabilities:

1. An elevation of privilege vulnerability in Win32k can be exploited remotely via specially crafted application to gain privileges.
2. An elevation of privilege vulnerability in Windows User Profile Service can be exploited remotely via specially crafted application to gain privileges.
3. An information disclosure vulnerability in Windows GDI can be exploited remotely via specially crafted application to obtain sensitive information.
4. An elevation of privilege vulnerability in Windows Backup Service can be exploited remotely via specially crafted application to gain privileges.
5. An information disclosure vulnerability in Windows Key Isolation Service can be exploited remotely via specially crafted application to obtain sensitive information.
6. An information disclosure vulnerability in Windows Network Driver Interface Specification (NDIS) can be exploited remotely via specially crafted application to obtain sensitive information.
7. An elevation of privilege vulnerability in Windows Graphics Component can be exploited remotely via specially crafted application to gain privileges.
8. A remote code execution vulnerability in Windows can be exploited remotely via specially crafted request to execute arbitrary code.
9. An elevation of privilege vulnerability in Windows Search Indexer can be exploited remotely via specially crafted application to gain privileges.
10. An elevation of privilege vulnerability in Active Directory can be exploited remotely to gain privileges.
11. An elevation of privilege vulnerability in Windows Kernel can be exploited remotely via specially crafted application to gain privileges.
12. A remote code execution vulnerability in Remote Desktop Client can be exploited remotely to execute arbitrary code.
13. An elevation of privilege vulnerability in Windows Function Discovery Service can be exploited remotely via specially crafted application to gain privileges.
14. An elevation of privilege vulnerability in Windows Installer can be exploited remotely via specially crafted application to gain privileges.
15. An information disclosure vulnerability in Windows Kernel can be exploited remotely via specially crafted application to obtain sensitive information.
16. A remote code execution vulnerability in Windows Imaging Library can be exploited remotely via specially crafted file to execute arbitrary code.
17. An elevation of privilege vulnerability in Windows Common Log File System Driver can be exploited remotely via specially crafted application to gain privileges.
18. A memory corruption vulnerability in Media Foundation can be exploited remotely via specially crafted document to execute arbitrary code.
19. An elevation of privilege vulnerability in Windows Error Reporting Manager can be exploited remotely via specially crafted application to gain privileges.
20. A memory corruption vulnerability in Scripting Engine can be exploited remotely via specially crafted website to execute arbitrary code.
21. An elevation of privilege vulnerability in Windows can be exploited remotely via specially crafted application to gain privileges.
22. An elevation of privilege vulnerability in Windows Error Reporting can be exploited remotely via specially crafted application to gain privileges.
23. A remote code execution vulnerability in Remote Desktop Services can be exploited remotely to execute arbitrary code.
24. An information disclosure vulnerability in Windows Common Log File System Driver can be exploited remotely via specially crafted application to obtain sensitive information.
25. A remote code execution vulnerability in LNK can be exploited remotely to execute arbitrary code.
26. An information disclosure vulnerability in Windows can be exploited remotely via specially crafted application to obtain sensitive information.

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

Windows 10 Version 1909 for 32-bit Systems
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
Internet Explorer 11
Windows Server 2012 R2
Windows 10 for x64-based Systems
Windows Server 2008 for x64-based Systems Service Pack 2
Windows 10 Version 1909 for ARM64-based Systems
Windows 8.1 for x64-based systems
Windows 10 Version 1709 for 32-bit Systems
Windows Server, version 1909 (Server Core installation)
Windows RT 8.1
Windows Server 2008 for Itanium-Based Systems Service Pack 2
Windows Server 2008 for 32-bit Systems Service Pack 2
Windows 10 for 32-bit Systems
Windows Server 2012 (Server Core installation)
Internet Explorer 9
Windows 8.1 for 32-bit systems
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
Windows 10 Version 1909 for x64-based Systems
Windows 10 Version 1803 for x64-based Systems
Windows 10 Version 1809 for ARM64-based Systems
Windows Server 2008 R2 for x64-based Systems Service Pack 1
Windows Server, version 1903 (Server Core installation)
Windows 10 Version 1903 for 32-bit Systems
Windows 10 Version 1809 for 32-bit Systems
Windows Server 2019 (Server Core installation)
Windows 7 for 32-bit Systems Service Pack 1
Windows 10 Version 1803 for 32-bit Systems
Windows 10 Version 1803 for ARM64-based Systems
Windows Server 2016 (Server Core installation)
Windows 10 Version 1809 for x64-based Systems
Windows 10 Version 1607 for x64-based Systems
Windows 10 Version 1709 for ARM64-based Systems
Windows Server 2019
Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1
Internet Explorer 10
Windows Server 2012
Windows Server 2012 R2 (Server Core installation)
Windows Server, version 1803 (Server Core Installation)
Windows 10 Version 1903 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 10 Version 1709 for x64-based Systems
Windows 7 for x64-based Systems Service Pack 1
Windows Server 2016
Windows 10 Version 1903 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)

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