Stack-based buffer overflow in the HMIWeb Browser HSCDSPRenderDLL ActiveX control in Honeywell Process Solutions (HPS) Experion R2xx, R30x, R31x, and R400.x; Honeywell Building Solutions (HBS) Enterprise Building Manager R400 and R410.1; and Honeywell Environmental Combustion and Controls (ECC) SymmetrE R410.1 allows remote attackers to execute arbitrary code via unspecified vectors.