POP2 or POP3 server (pop3d) in imap-uw IMAP package on FreeBSD and other operating systems creates lock files with predictable names, which allows local users to cause a denial of service (lack of mail access) for other users by creating lock files for other mail boxes.

Cyrus 2.0.15, 2.0.16, and 1.6.24 on BSDi 4.2, with IMAP enabled, allows remote attackers to cause a denial of service (hang) using PHP IMAP clients.

Buffer overflow in University of Washington c-client library (used by pine and other programs) allows remote attackers to execute arbitrary commands via a long X-Keywords header.

Buffer overflow in the pop-2d POP daemon in the IMAP package allows remote attackers to gain privileges via the FOLD command.

Buffer overflow in University of Washington's implementation of IMAP and POP servers.