New Zealanders are being warned to be concerned and act swiftly after a massive email hack that’s being blamed on China, Newshub reports. According to Microsoft, its email exchange software has been infiltrated in a state-sponsored attack which the White House is now calling an “active threat.” There are fears that hundreds of thousands of public and private sector organisations worldwide have been compromised, allowing hackers to download emails. AUT computer science professor Dave Parry said the hackers could steal valuable intellectual property or use information to blackmail people, and advised that people should download a fix immediately – although this will only work if servers were not already compromised.