Office 2016
Update for Skype for Business 2016 (KB4486745)
Update for Microsoft Office 2016 (KB4486746)
Update for Microsoft Office 2016 (KB4486747)
Update for Microsoft Office 2016 (KB4486668)
Update for Microsoft Project 2016 (KB4486749)
Update for Microsoft Publisher 2016 (KB4484334)
Update for Microsoft Office 2016 (KB4486716)
Update for Microsoft Visio 2016 (KB4486709)
Update for Microsoft Word 2016 (KB4486756)

Windows Security Updates
Windows 7 SP1 and Windows Server 2008 R2

Monthly Rollup: KB4592471
Security-only: KB4592503
Updates and improvements:

Fixed a security vulnerability by preventing programs that runs as System from printing to FILE ports.
Security updates
Windows 8.1 and Windows Server 2012 R2

Monthly Rollup: KB4592484
Security-only: KB4592495
Updates and improvements:

Fixed an issue that prevented PDF24 Creator version 9.1.1 from opening .txt files. (Monthly Rollup only)
Fixed a security vulnerability by preventing programs that runs as System from printing to FILE ports.
Security updates
Windows 10 version 1809

Support page: KB4592440
Updates and improvements:

Fixed a security vulnerability by preventing programs that runs as System from printing to FILE ports.
Security updates
Windows 10 version 1903 and 1909

Support page: KB4592449
Updates and improvements:

Fixed a security vulnerability by preventing programs that runs as System from printing to FILE ports.
Security updates
Windows 10 version 2004 and 20H2

Support page: KB4592438
Updates and improvements:

Fixed a security vulnerability by preventing programs that runs as System from printing to FILE ports.
Security updates
Other security updates

KB4592468 -- 2020-12 Security Monthly Quality Rollup for Windows Embedded 8 Standard and Windows Server 2012 (KB4592468)

KB4592497 -- 2020-12 Security Only Quality Update for Windows Embedded 8 Standard and Windows Server 2012 (KB4592497)

KB4592498 -- 2020-12 Security Monthly Quality Rollup for Windows Server 2008 (KB4592498)

KB4592504 -- 2020-12 Security Only Quality Update for Windows Server 2008 (KB4592504)

KB4592464 -- 2020-12 Cumulative Update for Windows 10 Version 1507 (KB4592464)

KB4593226 -- 2020-12 Cumulative Update for Windows Server 2016 and Windows 10 Version 1607 (KB4593226)

KB4592473 -- 2020-12 Cumulative Update for Windows 10 Version 1703 (KB4592473)

KB4592446 -- 2020-12 Cumulative Update for Windows 10 Version 1803 (KB4592446)

Servicing Stack Updates:

2020-12 Servicing Stack Update for Windows Embedded Standard 7, Windows 7, and Windows Server 2008 R2 (KB4592510)

2020-12 Servicing Stack Update for Windows Server, version 20H2, Windows 10 Version 20H2, Windows Server, version 2004, and Windows 10 Version 2004 (KB4593175)

Operating System Distribution
Windows 7 (extended support only): 5 vulnerabilities: 0 critical and 5 important
Windows 8.1: 7 vulnerabilities: 0 rated critical and 7 rated important
Windows 10 version 1809: 13 vulnerabilities: 0 critical and 13 important
Windows 10 version 1903 and 1909: 13 vulnerabilities: 0 critical and 13 important
Windows 10 version 2004 and 20H2: 13 vulnerabilities, 0 critical, 13 important
Windows Server products

Windows Server 2008 R2 (extended support only):5 vulnerabilities: 0 critical and 5 important
Windows Server 2012 R2: 8 vulnerabilities: 0 critical and 8 important.
Windows Server 2016: 8 vulnerabilities: 0 critical and 8 important.
Windows Server 2019: 8 vulnerabilities: 0 critical and 8 important.
Other Microsoft Products

Internet Explorer 11: nothing listed
Microsoft Edge (classic): 1 vulnerabilities: 1 critical
CVE-2021-1705 -- Microsoft Edge (HTML-based) Memory Corruption Vulnerability
Microsoft Edge (Chromium)
see here (latest security patches from the Chromium project)