The North Carolina Department of Information Technology which oversees the state's cybersecurity insisted in a statement that their sites are not vulnerable.
They also said when they became aware of the issue, they developed a plan to address the concerns.
They are not aware of any information being compromised, according to the state and that they regularly partner with the FBI and the Department of Homeland Security.
Craig Petronella, a cybersecurity expert at Raleigh's Petronella Technology group said the state's claims that its sites aren't vulnerable is an overstatement.
"I say that's impossible to say that because every website is vulnerable at some level," he said.
After ABC11 started investigating Tuesday afternoon, the North Carolina Department of Revenue's website was taken down for maintenance.
It is now back up with a disclaimer warning users they may need to upgrade software to use it.