Overview
You may want to know if EndPointSecurity requires Adobe flash because you intend to remove it from your computer. For example, downloading patch KB4577586 on your Windows Server 2012 R2 removes the Adobe Flash Player.
Information
Adobe Flash Player is not a required software for GFI EndPointSecurity, it is not mentioned as a system requirement, so you can remove it.
Please find the system requirements for GFI EndPointSecuirty on this page: GFI EndPointSecurity - System Requirements.