I think cis should warn us if an application tries to use port 80 to acceed a remote adress. Some firewalls do it : Outpost for example...
CIS warns you too, you are probably using safemode or similar, some safe applications such as a KAV antivirus get automatically allowed then. Set CIS to custom policy and alert settings HIGH.
Check your firewalls network security policy too to see if you have any previous allowed rules for KAV, if so, remove them.
Firewall > Advanced > Network Security Policy.
Now you should get an alert next time KAV tries to connect the Internet.
