President Joe Biden is once again under pressure to tackle cyber threats following the Microsoft Exchange ProxyLogon hack. In January, when the USA was suffering from the SolarWinds hack, Biden allocated $10 billion in his Covid budget to go towards enhancing cyber defences. However, the latest exploit has left systems even more vulnerable. Microsoft announced that a state sponsored Chinese group named Hafnium was responsible for the ProxyLogon attacks. The SolarWinds hack was blamed on a Russian group. With cybersecurity now a question of national security, Biden will be under pressure to act in response.