A remote code execution vulnerability in Windows SMBv3 Client/Server can be exploited remotely via specially crafted packet to execute arbitrary code.

Malware exists for this vulnerability. Usually such malware is classified as Exploit. More details.

Windows 10 Version 1909 for 32-bit Systems
Windows Server, version 1903 (Server Core installation)
Windows 10 Version 1903 for 32-bit Systems
Windows Server, version 1909 (Server Core installation)
Windows 10 Version 1903 for ARM64-based Systems
Windows 10 Version 1909 for x64-based Systems
Windows 10 Version 1903 for x64-based Systems
Windows 10 Version 1909 for ARM64-based Systems

Install necessary updates from the KB section, that are listed in your Windows Update (Windows Update usually can be accessed from the Control Panel)

CVE-2020-0796

4551762