We told you about KRTV in Great Falls broadcasting the hilarious zombie Emergency Alert.

Turns out an internal investigation by Cordillera Communications showed it was a password breach that allowed someone to hack into the Emergency Alert System and broadcast a fake warning about bodies rising from their graves, and zombies attacking the living.

Each EAS unit comes with a factory default password, just like the voice mail on your cellphone. Apparently nobody at KRTV ever reset the password and that made it easy for the hacker. EAS officials also said passwords should be reset at least once a year and that such systems need to be protected by a firewall.