The RACInstaller.StateCtrl.1 ActiveX control in InstallerDlg.dll in RealNetworks GameHouse RealArcade Installer 2.6.0.481 performs unexpected type conversions for invalid parameter types, which allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free) via crafted arguments to the (1) AddTag, (2) Ping, (3) QueuePause, (4) QueueRemove, (5) QueueTop, (6) RemoveTag, (7) TagRemoved, or (8) message method.