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.

Buffer overflow in the automatic mail checking component of Pine 4.21 and earlier allows remote attackers to execute arbitrary commands via a long From: header.

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 University of Washington imapd version 4.7 allows users with a valid account to execute commands via LIST or other commands.

wu-ftp with FTP conversion enabled allows an attacker to execute commands via a malformed file name that is interpreted as an argument to the program that does the conversion, e.g. tar or uncompress.

Pine before version 4.21 does not properly filter shell metacharacters from URLs, which allows remote attackers to execute arbitrary commands via a malformed URL.

Pine 4.x allows a remote attacker to execute arbitrary commands via an index.html file which executes lynx and obtains a uudecoded file from a malicious web server, which is then executed by Pine.

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

Arbitrary command execution via IMAP buffer overflow in authenticate command.

MIME buffer overflow in email clients, e.g. Solaris mailtool and Outlook.