EMC Isilon OneFS and EMC IsilonSD Edge include an implementation of the SMB protocol. This implementation is vulnerable to a man-in-the-middle attack that could compromise the affected systems. EMC IsilonSD Edge OneFS versions 8.0.x and EMC Isilon OneFS versions 8.0.x, 7.2.1.x, 7.2.0.x, 7.1.1.x, and 7.1.0.x are affected.