Multiple buffer overflows in MERCUR Messaging 2005 before Service Pack 4 allow remote attackers to cause a denial of service (crash) via (1) "long command lines at port 32000" and (2) certain name service queries that are not properly handled by the SMTP service.
Unspecified vulnerability in MERCUR Messaging 2005 before Service Pack 4 allows remote attackers to cause a denial of service (crash) via a TOP command to the POP3 service.