microsoft says “update immediately”

So i was reading an article from CNN and it mentioned “Microsoft warns Windows 10 users to update immediately”

To what? what’s the update that needs to be applied? That part was left out.
You can read the article here:

I did a little digging and discovered the update they are encouraging be applied immediately is the 2019-08 Cumulative Update for Windows X Version X. It was released a week ago and should be available via Windows Update.

If i am managing your computers, this being handled and approved during your normal “patch maintenance night” routines.  If i do not maintain your machines, please make sure your computer is completely patched, and everything available via Windows Update is applied and installed.

Please let me know if you have any questions.