EMC Isilon OneFS 7.1.x and 7.2.x before 7.2.1.3 and 8.0.x before 8.0.0.1 and IsilonSD Edge OneFS 8.0.x before 8.0.0.1 does not require SMB signing within a DCERPC session over ncacn_np which allows man-in-the-middle attackers to spoof SMB clients by modifying the client-server data stream a similar issue to CVE-2016-2115.