https://wccftech.com/microsoft-windows-emergency-patch-zero-day/

Microsoft has rolled out an out-of-band security update to Windows 10 October 2018 Update, April 2018 Update, Fall Creators Update, Creators Update, Anniversary Update, and the original version of Windows 10. Today’s update only brings one security fix to Internet Explorer to patch up a zero-day remote code execution vulnerability that could give attackers full admin rights.

The security update is also available for Windows 7, Windows 8.1, and Windows Server.