Nosque MsgCore 2.14 stores passwords in cleartext: (1) the administrator password in the AdmPasswd registry key, and (2) user passwords in the Userbase.dbf data file, which could allow local users to gain privileges.

Super Mail Transfer Package (SMTP), later called MsgCore, has a memory leak which allows remote attackers to cause a denial of service by repeating multiple HELO, MAIL FROM, RCPT TO, and DATA commands in the same session.