Microsoft released SSU today on 08.09.2020 to all the Windows 10 versions in addition to LCU. KB4577266 is the latest Servicing Stack update which is available for 2004 now.
The patch will be installed automatically furthermore you can also obtain them from the Microsoft update catalog.
KB4577266 Servicing Stack Update Windows 10 2004
Basically, the patch proffers quality improvements to the servicing stack, the component that acts to install Windows updates. SSU confirms that you have a dependable and robust servicing stack in order to install the updates pushed from Microsoft.
Moreover, this package enables a design that incorporates the SSU into the LCU. To offer a seamless experience of installation the combination of LCU and SSU into a single package works efficiently.
How to download the latest Servicing stack update for Windows 10 2004 and install
1] From Windows update
To receive the Servicing stack update you need to press Win + I and select “Update & Security”.
From the right of the next Settings page, select the Check for updates.
2] By accessing the Microsoft update catalog
Direct download link – http://www.catalog.update.microsoft.com/Search.aspx?q=KB4577266
After going to this page, locate the file that is compatible with your compatible such as x64, x86, or ARM64.
Click the Download located in the right.
3] Through Windows Server Update Services
You can also download KB4577266 for Windows 10 2004 and install via WSUS.