An issue was discovered in Activision Infinity Ward Call of Duty Modern Warfare 2 through 2019-12-11. PartyHost_HandleJoinPartyRequest has a buffer overflow vulnerability and can be exploited by using a crafted joinParty packet. This can be utilized to conduct arbitrary code execution on a victim's machine.

Stack-based buffer overflow in Activision Infinity Ward Call of Duty Modern Warfare 2 before 2018-04-26 allows remote attackers to execute arbitrary code via crafted packets.