Remote code execution bug affecting various versions of IE
The flaw in question - CVE-2020-0674 - is a zero-day bug that exists in multiple versions of Internet Explorer and allows remote code execution.
It was flagged by Clément Lecigne of Google's Threat Analysis Group and Ella Yu from Qihoo 360 and is capable of corrupting memory in such a way that a hacker could easily execute malicious code on the target's system.
Once the vulnerability is exploited - using a specially crafted website/application - and the malicious code is executed, the hacker can gain the same user rights as those held by the owner of the targeted PC.
From there, the threat actor can take control of the system by installing malicious programs, viewing/changing/deleting personal data, or creating a new user account with complete admin privileges.