Microsoft has just released Cumulative Update KB4464330 for Windows 10 systems in 1809, Windows Server 2019 LTSC, and Windows Server ACore in 1809. The update uploads OS Build to the 17763.55 version.
What Microsoft says about this update.
Update does not add new features. Fixes a group policy that can delete files from the user profile. It also brings security updates for Windows Kernel, and many more as you can see in the above image.
To download the new updates (9 October) for older operating systems you can open the following link:
Versions for Windows 10 are included in the 1507, 1607, 1703, 1709, 1803, and 1809 versions.
For KB4464330, see the following link: