Cumulative Update for .NET Framework 3.5 and 4.8
http://download.windowsupdate.com/c/msdownload/update/software/updt/2020/12/windows10.0-kb4598300-x64-ndp48_4fb4e42aeaed95c1fd3177348e029d707ad121fe.msu
http://download.windowsupdate.com/c/msdownload/update/software/updt/2020/12/windows10.0-kb4598300-x86-ndp48_4eba9560953241c2b1db8fb941fef1aa977e9957.msu
Cumulative Update for .NET Framework 3.5 and 4.8
http://download.windowsupdate.com/c/msdownload/update/software/updt/2020/12/windows10.0-kb4598301-x64-ndp48_43cc2c8af60bd8df6995c0f872583cf3f796512c.msu
http://download.windowsupdate.com/c/msdownload/update/software/updt/2020/12/windows10.0-kb4598301-x86-ndp48_6c6045b3012d6172918750ef158135b8cc4a60ca.msu
Cumulative Update for .NET Framework 3.5 and 4.8
http://download.windowsupdate.com/d/msdownload/update/software/updt/2020/12/windows10.0-kb4598299-x64-ndp48_2a22d53bc60a559ba10701475913fcf79d06d940.msu
http://download.windowsupdate.com/d/msdownload/update/software/updt/2020/12/windows10.0-kb4598299-x86-ndp48_4e75800fce4e5df2b1474e93351c695e97c44791.msu