Format string vulnerability in the AXIMilter module in AXIGEN Mail Server 5.0.2 allows remote attackers to execute arbitrary code via format string specifiers in the CNHO command.

Heap-based buffer underflow in axigen 1.2.6 through 2.0.0b1 allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via certain base64-encoded data on the pop3 port (110/tcp), which triggers an integer overflow.

axigen 1.2.6 through 2.0.0b1 does not properly parse login credentials, which allows remote attackers to cause a denial of service (NULL dereference and application crash) via a base64-encoded "*\x00" sequence on the imap port (143/tcp).