IBM Lotus Notes Traveler before 8.5.1.2 does not reject an attachment download request for an e-mail message with a Prevent Copy attribute, which allows remote authenticated users to bypass intended access restrictions via this request.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2010-4512
http://www-10.lotus.com/ldd/dominowiki.nsf/dx/Lotus_Notes_Traveler_851_FP3_Release_Notes