https://wccftech.com/windows-10-may-2019-update-18362-53-is-out/

After releasing Windows 10 May 2019 Update to the Release Preview ring yesterday, Microsoft is now pushing out a new build for version 1903. “We have released Build 18362.53 (KB4495666) for Windows Insiders who are currently on Build 18362.30 of the Windows 10 May 2019 Update,” the company wrote.

Today’s update brings the monthly security updates that arrive every Patch Tuesday. Windows 10 May 2019 Update build 18362.53 also includes a known issue. Microsoft explains: