Threat modeling systems include one or more computing devices communicatively coupled with one or more databases, the database(s) including threat model components and threats associated with one another. One or more mapping files coupled with the database(s) correlate the threat model components with visual diagram components of a third party software application. An import interface initiates reading of a third party generated data file by the computing device(s), the data file including a subset of the third party diagram components and relationships between the subset. An interface receiving input initiates a determination of threat model components correlated with the subset. A diagram interface displays a relational diagram using visual representations of threat model components correlated with the subset, the relational diagram defining a threat model. A threat report interface includes a threat report displaying each threat that is associated with one of the threat model components of the threat model.