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 OPOSMSR.ocx for Mini MSR magnetic stripe readers, Retail Integrated Dual-Head MSR magnetic stripe readers, Integrated Single Head MSR w/o SRED magnetic stripe readers, Integrated Single Head w/o MSR SRED magnetic stripe readers, RP7 Single Head MSR w/o SRED magnetic stripe readers, POS keyboards, and POS keyboards with MSR, aka ZDI-CAN-2508.