Certain versions of Call Of Duty: WW2 have been causing disruptions like showing pornography, sending insulting messages, and potentially introducing ransomware on PCs.
Activision has taken the Xbox PC version of the game offline due to reports of a remote code execution exploit that allows hackers to manipulate the game's code remotely.
The disruptions in the game include references to lawyers involved in an Activision lawsuit against cheat code sellers, but Activision has not confirmed if it's a remote code execution issue, just stating it's addressing an 'issue'.
While Call Of Duty: WW2 is still available on Steam and Battle.net, it's advised to hold off playing until further details are revealed. Hacker group VX-Underground believes the disruptions are likely an RCE situation capable of more serious malware attacks.