Critical infrastructure, which provides essential services such as electricity, water supply, transport, and safety, to the general public, is often the target of cyber attacks by foreign actors. Attacks on such infrastructure have the potential to massively impact the lives of a great number of people. From the perspective of international law, their legality raises questions. In addition, the potentially remote nature of cyber attacks makes it difficult to respond through the proper diplomatic channels. The committee should come up with clear guidelines for international lawmakers that prescribe what does and does not constitute a cyber attack on civilian targets, and which responses to such cyber attacks would be legal.