Microsoft is now rolling out a small cumulative update for Windows 10 build 18305 which bumps the version number to build 18305.1003, and it addresses a remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer.
No additional features or improvements are included with this update. You can see all the changes for build 18035 in this guide.
The update will download and install automatically on supported devices. If you want to learn more, check this Microsoft support website.