VISA just released this Security Alert. It affects everyone who uses a Point-of-Sale (POS) terminal to accept credit card payments. If you use that small device by your register to slide cards in order to accept payment you may be at risk.
VISA has identified malicious code that can allow hackers to gain access to the credit card information you are receiving through these POS terminals. Some of the service providers who maintain these devices are not following good security practices and