Activision says it has addressed all known vulnerabilities affecting the Steam version of Call of Duty: Modern Warfare 2 (2009). The publisher confirmed that an update released this week targeted the security issues surrounding the original Infinity Ward shooter, which has faced years of reports involving hacked lobbies and potentially dangerous exploits. Activision also says additional updates for its legacy Call of Duty titles are coming soon.
In a statement provided to Windows Central, Activision said the latest patch “addressed all known vulnerabilities” in Modern Warfare 2. The company added that its team is continuing to support older Call of Duty releases and encouraged anyone who discovers further security problems to report them through Activision’s Bug Bounty program. The wording is important: Activision is specifically claiming that all vulnerabilities currently known to the company have been addressed, rather than guaranteeing that undiscovered security flaws cannot exist.
Modern Warfare 2’s PC security problems have been a longstanding concern because some reported vulnerabilities went beyond conventional multiplayer cheating. Remote code execution, commonly shortened to RCE, can potentially allow malicious code to be executed on another player’s computer without the usual level of direct interaction. That creates a fundamentally different risk from encountering an aimbot or wallhack in an online match.
Those concerns became especially visible in 2023, when Activision temporarily took Modern Warfare 2’s Steam multiplayer offline after reports that players were encountering malware through compromised lobbies. Security researchers and players reported a self-spreading worm that could move between users participating in multiplayer sessions. Activision later restored the game following an update, but concerns about the broader security of older Call of Duty PC titles continued.
The new patch therefore matters even though Modern Warfare 2 is now nearly 17 years old. The game remains available for purchase on Steam and still has an active multiplayer community, meaning outdated networking code and unresolved exploits can continue affecting real players long after a title’s original support cycle would normally have ended. Maintaining those games becomes more important when publishers continue selling them digitally and keeping their multiplayer infrastructure accessible.
Activision’s comments also suggest the company is taking a broader look at its older catalog rather than treating Modern Warfare 2 as an isolated case. It says additional legacy-title updates are coming soon, although it has not identified which Call of Duty games will receive them or what specific problems those patches will address. Several older entries have accumulated reports of cheating, hacked lobbies and security issues over the years, particularly on PC.
That work arrives alongside Activision’s much more aggressive security efforts around current Call of Duty releases. The company continues developing RICOCHET Anti-Cheat for newer games while also pursuing cheat providers directly, including legal action and cease-and-desist efforts against Call of Duty cheat sellers. Legacy-game security is a different technical problem, however, because many of these titles were designed around older networking systems that predate the protections now built into modern Call of Duty releases.
Modern Warfare 2 originally launched in November 2009 and remains one of the franchise’s most recognizable entries. Its PC version uses multiplayer technology from an era when the scale and sophistication of modern cheating tools and remote exploits were far less prominent concerns. That makes continued maintenance more complicated than simply applying the protections used in a contemporary Call of Duty game.
It is also unclear how far Activision intends to extend this renewed legacy support. The publisher has not committed to a complete security overhaul of every older Call of Duty title, nor has it provided a timetable for the additional updates it mentioned. For now, the confirmed development is limited to Modern Warfare 2’s latest Steam patch and Activision’s statement that further work on older games is underway.
Players should also distinguish the 2009 release from 2022’s Call of Duty: Modern Warfare II, which is a separate game built on newer technology. Activision’s statement concerns the original Modern Warfare 2 available on Steam, not the later reboot-era title.
With the latest update deployed, Activision says every vulnerability currently known to its team in Modern Warfare 2 (2009) has been fixed. The larger significance may be what comes next: additional patches for other legacy Call of Duty games could make parts of the franchise’s older PC catalog considerably safer to revisit.
