Irrespective of the specific substantive area of regulation, the term ‘transit state’ invokes notions of space and duration. It refers to a territory – usually of a third state – that is crossed over for a certain length of time. This contribution looks specifically to the potential obligations of transit states with regard to events that take place in a very particular space and in effect usually only last for a split moment: harmful cyber-incidents. Concepts originally endemic to ‘ius in bello’ and neutrality as well as the rules on state responsibility have a role to play in determining the applicable rules and extent of obligations. The ambitious Tallinn Manual of 2013 provides a landmark set of rules providing for a framework that comprehensively deals with a number of the most pressing issues concerning cyberwarfare.