Just a few hours ago, the Modern Warfare Update 1.12 was released. Now there seem to be some problems, all Modern Warfare servers are offline.
After downloading update 1.12 with just around 10 GB, you can no longer connect to the online service. The reason for this is that the Modern Warfare servers are offline.
In the meantime the servers were accessible again, but then offline again.
It is currently unknown whether the problem has been resolved or whether the problems continue.
We will keep you up to date!
December 18th, 2019