https://www.bleepingcomputer.com/news/security/microsoft-releases-kb4551762-security-update-for-smbv3-vulnerability/

Microsoft released the KB4551762 security update to patch the pre-auth RCE Windows 10 vulnerability found in Microsoft Server Message Block 3.1.1 (SMBv3), two days after details regarding the flaw were leaked as part of the March 2020 Patch Tuesday.

The KB4551762 security update tracked as CVE-2020-0796 addresses "a network communication protocol issue that provides shared access to files, printers, and serial ports," according to Microsoft.