Microsoft patched the bug known as CVE-2020-0796 back in March; it affects Windows 10 and Windows Server 2019, and ranks 10 out of 10 on CVSS scale. Many of these vulnerable systems (22 percent) are in Taiwan, Japan (20 percent), Russia (11 percent) and the U.S. (9 percent) The Department of Homeland Security urged companies to update in June, saying cybercriminals are targeting the unpatched systems. To protect clients from outside attacks, it s necessary to block TCP port 445 at the enterprise perimeter firewall.
Source: https://threatpost.com/microsofts-smbghost-flaw-108k-windows-systems/160682/