What is big deal with the Zero-day bug

Question

What is the "Zero-day" bug and how is Microsoft dealing with it?

Answer 1

This bug was found in Windows 7, 8.1 and 10. 

"A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer," Microsoft stated in the support document. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. This is the "Zero-day" bug. 

This bug could be exploited by simply drawing users using IE9, IE10 or IE11 to a random malicious website.

Microfost has dealt with this security issue and released an early update, prior to their next update release. This new update will be implemented automatically on most of the unmanaged PCs