Comodo Firewall Pro (formerly Comodo Personal Firewall) 2.4.17.183 and earlier uses a weak cryptographic hashing function (CRC32) to identify trusted modules, which allows local users to bypass security protections by substituting modified modules that have the same CRC32 value.

Comodo Firewall Pro (CFP) (formerly Comodo Personal Firewall) 2.4.18.184 and earlier allows local users to bypass driver protections on the HKLM\SYSTEM\Software\Comodo\Personal Firewall registry key by guessing the name of a named pipe under \Device\NamedPipe\OLE and attempting to open it multiple times.