https://wccftech.com/windows-10-cumulative-update-build-19608-1006-kb4557426-is-out/

Earlier this week, Microsoft released a new Windows 10 Insider Preview Build 19608 to Windows Insiders in the Fast ring who are currently testing features for the future Windows 10 versions. The update brought improvements to the default app experience along with some "Your Phone" app updates and new features.

Today, the Windows maker has released a cumulative update for this build. Microsoft said that the Windows 10 Cumulative Update Build 19608.1006 (KB4557426) contains only a single fix that is being released to improve the overall reliability of the operating system.