According to Sir Dystic, "The problem is that from a marketing standpoint, Microsoft wants their products to have as much backward compatibility as possible; but by continuing to use protocols that have known issues, they continue to leave their customers at risk to exploitation... These are, yet again, known issues that have existed since day one of this protocol. This is not a bug but a fundamental design flaw. To assume that nobody has used this method to exploit people is silly; it took me less than two weeks to write SMBRelay."