Here's details on what the exploits would do
So it was obvious that someone had access to the server in order to execute a virus or w/e well basically on servers it got to the point where tabs would pop up such as Screamers or Porn links etc. It could've even gotten to a compromise point honestly. Thank god though Activision has fixed it and the servers are normal again.
What's your opinions on them fixing it and it took quite a long time too so that's some (quality) support