An Incomplete Comparison with Missing Factors vulnerability in the Gallagher Controller allows an attacker to bypass PIV verification. This issue affects: Gallagher Command Centre 8.40 versions prior to 8.40.1888 (MR3); 8.30 versions prior to 8.30.1454 (MR3); 8.20 versions prior to 8.20.1291 (MR5); 8.10 versions prior to 8.10.1284 (MR7); version 8.00 and prior versions.