Cisco has acknowledged (and released patches for) a fairly serious security bug in three of their virtual appliances that, oddly enough, are related to security. The three products in question are the Cisco Web Security Virtual Appliance, the Email Security Virtual Appliance and the Security Management Virtual Appliance. These three devices all share a default preinstalled SSH encryption key. This meddlesome little fact means that it is very simple to get into an SSH session because you can grab the key off of another copy of the product. We are pretty sure that the default keys are already floating around on the internet somewhere as well.