https://www.ghacks.net/2021/07/13/microsoft-windows-security-updates-july-2021-overview/
Windows 7 (extended support only): 30 vulnerabilities: 3 critical and 27 important
Windows Print Spooler Remote Code Execution Vulnerability -- CVE-2021-34527
Windows MSHTML Platform Remote Code Execution Vulnerability -- CVE-2021-34497
Scripting Engine Memory Corruption Vulnerability -- CVE-2021-34448
Windows 8.1: 39 vulnerabilities: 3 critical and 36 important
same as Windows 7
Windows 10 version 1903 and 1909: 67 vulnerabilities: 5 critical and 62 important
same as Windows 7, plus
Windows Hyper-V Remote Code Execution Vulnerability -- CVE-2021-34450
Microsoft Windows Media Foundation Remote Code Execution Vulnerability -- CVE-2021-34503
Windows 10 version 2004, 20H2 and 21H1 : 68 vulnerabilities, 4 critical and 64 important
Windows Print Spooler Remote Code Execution Vulnerability -- CVE-2021-34527
Windows MSHTML Platform Remote Code Execution Vulnerability -- CVE-2021-34497
Windows Hyper-V Remote Code Execution Vulnerability -- CVE-2021-34450
Scripting Engine Memory Corruption Vulnerability -- CVE-2021-34448
Windows Server products
Windows Server 2008 R2 (extended support only): 37 vulnerabilities: 1 critical and 11 important
Windows DNS Server Remote Code Execution Vulnerability -- CVE-2021-34494
Windows Print Spooler Remote Code Execution Vulnerability -- CVE-2021-34527
Windows MSHTML Platform Remote Code Execution Vulnerability -- CVE-2021-34497
Windows Server 2012 R2: 50 vulnerabilities: 4 critical and 46 important
Scripting Engine Memory Corruption Vulnerability -- CVE-2021-34448
Windows MSHTML Platform Remote Code Execution Vulnerability -- CVE-2021-34497
Windows DNS Server Remote Code Execution Vulnerability -- CVE-2021-34494
Windows Print Spooler Remote Code Execution Vulnerability -- CVE-2021-34527
Windows Server 2016: 60 vulnerabilities: 6 critical and 54 important.
same as Windows Server 2021 R2 plus
Windows Kernel Remote Code Execution Vulnerability -- CVE-2021-34458
Microsoft Windows Media Foundation Remote Code Execution Vulnerability -- CVE-2021-34439
Windows Server 2019: 77 vulnerabilities: 2 critical and 22 important
Microsoft Windows Media Foundation Remote Code Execution Vulnerability -- CVE-2021-34439
Windows MSHTML Platform Remote Code Execution Vulnerability -- CVE-2021-34497
Windows DNS Server Remote Code Execution Vulnerability -- CVE-2021-34494
Windows Kernel Remote Code Execution Vulnerability -- CVE-2021-34458
Windows Hyper-V Remote Code Execution Vulnerability -- CVE-2021-34450
Scripting Engine Memory Corruption Vulnerability -- CVE-2021-34448
Windows Media Remote Code Execution Vulnerability -- CVE-2021-33740
Windows Print Spooler Remote Code Execution Vulnerability -- CVE-2021-34527