Increasing numbers of high profile cyber-attacks mean that the risks of a data theft, serious outage or a ransom demand are risks that corporate treasurers cannot ignore. In addition, the incidents such as the CrowdStrike outage have exposed the global reliance on IT to run our businesses. We explore the risks facing boardrooms more broadly in detail here; in this briefing we consider how cyber-insecurity affects treasurers, their financings and derivative transactions.