Multiple stack-based buffer overflows in the KeyHelp.KeyCtrl.1 ActiveX control in KeyHelp.ocx 1.2.312 in KeyWorks KeyHelp Module (aka the HTML Help component), as used in EMC Documentum ApplicationXtender Desktop 5.4; EMC Captiva Quickscan Pro 4.6 SP1; GE Intelligent Platforms Proficy Historian 3.1, 3.5, 4.0, and 4.5; GE Intelligent Platforms Proficy HMI/SCADA iFIX 5.0 and 5.1; GE Intelligent Platforms Proficy Pulse 1.0; GE Intelligent Platforms Proficy Batch Execution 5.6; GE Intelligent Platforms SI7 I/O Driver 7.20 through 7.42; and other products, allow remote attackers to execute arbitrary code via a long string in the second argument to the (1) JumpMappedID or (2) JumpURL method.