Lexmark X, W, T, E, C, 6500e, and 25xxN devices before 2011-11-15 allow attackers to obtain sensitive information via a hidden email address in a Scan To Email shortcut.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2011-3233
http://contentdelivery.lexmark.com/webcontent/Email_shortcut_vulnerability.pdf