Multiple buffer overflows in MDaemon 6.5.1 allow remote attackers to cause a denial of service (application crash) via a long (1) SAML, SOML, SEND, or MAIL command to the SMTP server or (2) LIST command to the IMAP server.
https://exchange.xforce.ibmcloud.com/vulnerabilities/17477
https://exchange.xforce.ibmcloud.com/vulnerabilities/17476