Reports from the POC2012 Conference in Seoul suggest games running CryEngine 3 or Modern Warfare 3's IW Engine might be subject to various security issues.
Although the exact nature of these security risks are unknown, the company isn't willing to volunteer its results into public awareness. Instead, they will wait official commission from Activision.
CryEngine and Modern Warfare 3 engine open to security flaws
13 November 2012 | By Nick Akerman