Microsoft released quality improvements to the servicing stack for all Windows 10 versions. Windows 10 users are urged to update their systems’ servicing stack as soon as possible. Microsoft states that this critical servicing stack update “addressed an issue in which adding vulnerable boot level components to the Secure Boot disallow list (dbx) may cause the system not to start”” Windows Server users can also use the Windows Server Update Services (WSUS) to mass deploy the update to all computers on their network. These updates can be installed automatically through Windows Update or using the standalone update packages available for download from the Microsoft Update Catalog website.”
Source: https://www.bleepingcomputer.com/news/microsoft/microsoft-releases-servicing-stack-updates-for-all-windows-10-versions/