The solution is a web-based Vulnerability Assessment tool developed by STAM within InfraStress project. This tool is capable to perform a quantitative Risk Assessment against security physical threats in an automatic way. In fact, once the user has modelled its own critical infrastructure through simple actions on an intuitive Graphic User Interface, the computation engine is ready to run. Thousands of risk scenarios are then generated and analysed to estimate likelihood and impact of the possible consequences. At the end of the computation, results are shown to the user in an interactive dashboard.