https://wccftech.com/microsoft-releases-update-windows-10-security-bug/

Microsoft has delivered an update for all supported Windows 10 versions bringing only one fix to an Internet Explorer vulnerability. The exploit is a remote code execution bug that could enable an attacker to gain admin rights if the current user is logged on with administrative user rights.

Tracked as CVE-2019-136, here is how the software maker explains this scripting engine memory corruption vulnerability: