After KB4457128 and KB446218, Microsoft has released Cumulative Update KB4458469 for Windows 10 version 1803 with a massive changelog on September 26, 2018. This is the third CU pushed in the month of September and it increases OS build number to 17134.320. The support page confirms Microsoft has released this update in the past (which we’ve not received when we checked for updates and we’re on build 17134.286 prior to installing this update) and now being published again to include a missing solution.
KB4458469 Update for Windows 10 version 1803
You can find the KB4458469 changelog here.
Direct download links