In the last decade, the maritime industry has undergone a strong digitalization process, moving from mechanical systems to digital and automated systems thanks to the technological evolution that has also allowed the use of IOT systems. As a result, the ships are increasingly connected to external environments. Having systems interconnected with the outside world increases the ship’s exposure to possible cyberattacks. In this thesis, the focus was the analysis of the ship attack surface considering the systems more used on board the ships; for this reason, an analysis of those systems is also carried out in this thesis. The behaviour of external systems which are used for managing containers, has also been described since, although they are not inside the ship, can indirectly affect their safety.