DHB cyber attack escalates to national crisis - urgent meeting called Waikato DHB. (Photo / NZ Herald) DHB cyber attack escalates to national crisis - urgent meeting called Wed, 26 May 2021, 4:57PM The country's biggest ever cyber attack has been escalated to a national crisis with top level Government officials holding an urgent meeting to discuss a plan of action. Health Minister Andrew Little says the meeting, involving the Officials' Committee for Domestic and External Security Co-ordination (ODESC), is being held in Wellington this afternoon. "The crisis response to the ransomware attack on the Waikato DHB has been stepped up. The Ministry of Health is increasing its resourcing of the dedicated response team," Little said.