SMB v2 bug not a popular target, says security experts It has been a week since hackers released software that could be used to attack a flaw in Windows Vista and Server 2008, but Microsoft and security companies say that criminals haven’t done much with the attack. Microsoft said it hadn’t seen any attacks that used the vulnerability, an analysis that was echoed by security companies such as SecureWorks, Symantec and Verisign’s iDefense unit. While criminals jumped on a similar flaw a year ago, using it in widespread attacks that ultimately forced Microsoft to rush out a security patch ahead of its monthly set of security updates, that hasn’t happened with this latest bug, which lies in the SMB v2 software used by Vista and Server 2008 to do file-and-printer sharing.