Microsoft has today pushed new security patches Build 18362.535 and 18363.535 (KB4530684) & Build 17763.914 (KB4530715) to Windows 10 version 1909, 1903 and version 1809 (October 2018 update). These updates bring only fixes and improvements for their Windows 10 versions.
You can read more about these updates here. Provided below are the direct download links for these updates in case you need to do a manual install.