Buffer overflow in the base64 decoder in MERCUR Mailserver 4.2 before SP3a allows remote attackers to cause a denial of service and possibly execute arbitrary code via a long (1) AUTH command to the POP3 server or (2) AUTHENTICATE command to the IMAP server.

Multiple stack-based buffer overflows in Atrium MERCUR IMAPD in MERCUR Mailserver before 4.2.15.0 allow remote attackers to execute arbitrary code via a long (1) EXAMINE, (2) DELETE, (3) SUBSCRIBE, (4) RENAME, (5) UNSUBSCRIBE, (6) LIST, (7) LSUB, (8) STATUS, (9) LOGIN, (10) CREATE, or (11) SELECT command.

Buffer overflow in the control service for MERCUR Mailserver 4.2 allows remote attackers to execute arbitrary code via a long password.

Atrium Mercur Mail Server 3.2 allows local attackers to read other user's email and create arbitrary files via a dot dot (..) attack.

Buffer overflow in POP3 and IMAP servers in the MERCUR mail server suite allows remote attackers to cause a denial of service.

Buffer overflow in the MERCUR WebView WebMail server allows remote attackers to cause a denial of service via a long mail_user parameter in the GET request.