The government's Computer Emergency Response Team (Cert NZ) says people should make sure software on their devices is up-to-date after a design flaw in most processing chips was made public last week.
The Meltdown and Spectre vulnerabilities, which leaves users open to cyber attacks, affect most devices including computers, phones and tablets, prompting software developers to build patches addressing those hardware flaws.
Researchers discovered the weaknesses, leading technology companies to bring forward an announcement of the patches.
"Cert NZ's advice to protect against these vulnerabilities is to ensure that all software on all devices is up-to-date," said director Rob Pope.
"Device and software manufacturers are working on updates for their products and many have been released already."