Abstract: Systems and methods are presented for mitigating cyber threats. Cybersecurity-related data are stored in a semantic cybersecurity database. A user interface converts a user input to a command utterance. A command node that corresponds to the command utterance is identified in the cybersecurity database. The command node is resolved to one or more action nodes that are connected to the command node, and each action node is resolved to one or more parameter nodes that are connected to the action node. The command node has a command that implements actions indicated in the action nodes. Each action can have one or more required parameters indicated in the parameter nodes. The values of the required parameters are obtained from the command utterance, prompted from the user, or obtained from the cybersecurity database. Actions with their parameter values are executed to mitigate a cyber threat in accordance with the user input.