Saralonde writes: It's no secret to anyone who has seen a Walmart Self-Checkout start up that these machines run on the venerable Windows XP. However, these machines are still home to a host of vulnerabilities, including the infamous MS_08_067 netapi vulnerability. Most of these systems still run on unpatched XP SP1, leaving them wide open to a range of attacks, as well as any vulnerabilities in IE6. Also still being ran is MSXML 4.0, in an unpatched form. Do we really trust the world's biggest retailer with our card data when it can't even be trusted to secure its own transactions? These were observed by a Walmart employee from a small midwest town that shall remain unnamed.