The OLE Point of Sale (OPOS) drivers before 1.13.003 on HP Point of Sale Windows PCs allow remote attackers to execute arbitrary code via vectors involving OPOSPOSPrinter.ocx for PUSB Thermal Receipt printers, SerialUSB Thermal Receipt printers, Hybrid POS printers with MICR, Value PUSB Receipt printers, and Value Serial/USB Receipt printers, aka ZDI-CAN-2506.