A system and method for evaluating cyber-security threat incidents of a computer network is described in this document. In particular, it is described that cyber-security threat incidents of a computer network may be visualized by displaying these threat incidents as a plurality of graphical objects on a display of a device. A subset of these graphical objects or threat incidents may then be selected by applying a single continuous touch input to a touch interface of the device. A risk score will then be generated and displayed based on the threat incidents that are contained within the subset of graphical objects. Mitigation actions addressing the cyber-security threats that triggered these threat incidents are then implemented by the device.