A new vulnerability in recent versions of Windows has the potential to unleash self-replicating attacks that allowed the WannaCry and NotPetya worms to cripple business networks around the world. The flaw, which is tracked as CVE-2020-0796, affects Windows 10 and Windows Server 2019. Patches aren t available, and Microsoft gave no timeline for releasing a fix. The vulnerability exists in version 3.1.1 of the Server Message Block. Block is used to share files, printers, and other resources on local networks.
Source: https://www.wired.com/story/a-new-wormable-windows-vulnerability-has-no-patch-in-sight/