I'm sorry, I don't understand the question? Are you asking what sort of Vulnerability Checks MVM has regarding firewall(s)? You might be able to search for the word "firewall" in the Scans Vuln Selection, Search By feature. There you will notice quite a few different types of firewall checks, like:
Barracuda Spam Firewall Information Disclosure and Shell Command Injection
Checkpoint Firewall-1 Authentication Server Format String
Kerio Personal Firewall Admin Service Detected
Raptor Firewall Accepts Telnet Connections
StoneGate Firewall Client Authentication Detection
Cisco IOS Firewall Application Inspection Control Denial Of Service Vulnerability
If that's not what you're asking, can you please clarify the question.