The massive security breaches and theft of credit card information at The Home Depot and Target have something in common. They were both allowed by a vulnerability in XP embedded that was more than 10 years old!
The XP embedded, used in their POS systems, (yes, both definitions apply) was Win XPe SP3, which is not the last version of the XP-based embedded OSes. This whole disaster could have been avoided if Target and Home Depot upgraded to Win7 for Embedded Systems. Internal IT security people knew about this and told their friends and relatives to pay cash at Home Depot. OUCH.