Microsoft today announced the release of Windows 10 Cumulative Update Build 20236.1005 (KB4587587). This new build does not include any new features or bug fixes, but it is designed to test Microsoft’s Windows servicing pipeline. Some Windows 10 Insiders reported that they were not able to install the previous Cumulative Update last month. Microsoft has now fixed the issue and this new update will be used to test the same.
Microsoft last week announced the release of Windows 10 Insider Preview Build 20231 to Windows Insiders in the Dev Channel. You can read about it here.