A remote code execution vulnerability exists in Windows Domain Name System servers when they fail to properly handle requests, aka 'Windows DNS Server Remote Code Execution Vulnerability'.
https://www.tenable.com/blog/one-year-later-what-can-we-learn-from-zerologon
https://www.tenable.com/blog/microsoft-s-march-2021-patch-tuesday-addresses-82-cves-cve-2021-26411
https://www.tenable.com/cyber-exposure/2020-threat-landscape-retrospective
https://www.tenable.com/blog/microsoft-s-september-2020-patch-tuesday-addresses-129-cves
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1350
http://packetstormsecurity.com/files/158484/SIGRed-Windows-DNS-Denial-Of-Service.html