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.

SV_SteamAuthClient in various Activision Infinity Ward Call of Duty games before 2015-08-11 is missing a size check when reading authBlob data into a buffer, which allows one to execute code on the remote target machine when sending a steam authentication request. This affects Call of Duty: Modern Warfare 2, Call of Duty: Modern Warfare 3, Call of Duty: Ghosts, Call of Duty: Advanced Warfare, Call of Duty: Black Ops 1, and Call of Duty: Black Ops 2.

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.

Call of Duty Elite for iOS 2.0.1 does not properly validate the server SSL certificate, which allows remote attackers to obtain sensitive information via a Man-in-the-Middle (MITM) attack.

PHP remote file inclusion vulnerability in index.php in Miguel Nunes Call of Duty 2 (CoD2) DreamStats System 4.2 and earlier allows remote attackers to execute arbitrary PHP code via a URL in the rootpath parameter.

Buffer overflow in (1) Call of Duty 1.5b and earlier, (2) Call of Duty United Offensive 1.51b and earlier, and (3) Call of Duty 2 1.3 and earlier allows remote attackers to execute arbitrary code via a long map argument to the "callvote map" command.

Quake 3 engine, as used in multiple games, allows remote attackers to cause a denial of service (client disconnect) via a long message, which is not properly truncated and causes the engine to process the remaining data as if it were network data.