Iomega NAS A300U uses cleartext LANMAN authentication when mounting CIFS/SMB drives, which allows remote attackers to perform a man-in-the-middle attack.
http://www.securityfocus.com/bid/6093
http://www.iss.net/security_center/static/10523.php
http://archives.neohapsis.com/archives/bugtraq/2002-10/0440.html