Microsoft Security Update Guide
https://portal.msrc.microsoft.com/en-us/security-guidance
check security issue for windows or windows server
update catalog
https://www.catalog.update.microsoft.com/Home.aspx
CISA
https://us-cert.cisa.gov/ncas/current-activity/2020/08/11/microsoft-addresses-rce-and-spoofing-vulnerabilities-under-active
references
https://www.cvedetails.com/vulnerability-list/vendor_id-26/Microsoft.html