Microsoft recently announced a critical security update for all versions of Windows DNS Server. Customers will need to apply this essential Windows update or workaround to address this vulnerability as soon as possible; both options are detailed in CVE-2020-1350. Note: Customers with automatic updates turned on do not need to take any additional action.

See the Security Update from Microsoft here: https://msrc-blog.microsoft.com/2020/07/14/july-2020-security-update-cve-2020-1350-vulnerability-in-windows-domain-name-system-dns-server/.