Login.pm in Barracuda Spam Firewall (BSF) 3.3.01.001 through 3.3.03.053 contains a hard-coded password for the guest account, which allows remote attackers to read sensitive information such as e-mail logs, and possibly e-mail contents and the admin password.
preview_email.cgi in Barracuda Spam Firewall (BSF) 3.3.01.001 through 3.3.03.053 allows remote attackers to execute commands via shell metacharacters ("|" pipe symbol) in the file parameter. NOTE: the attack can be extended to arbitrary commands by the presence of CVE-2006-4000.
Barracuda Spam Firewall 3.1.10 and earlier does not restrict the domains that white-listed domains can send mail to, which allows members of white-listed domains to use Barracuda as an open mail relay for spam.