Someone hacked the Emergency Alert System (EAS) at several small market TV stations on Monday, warning viewers that zombies were on the attack. An EAS manufacturer tells B&C that other stations risk similar hacks by not changing the default passwords on their devices. Stations affected included KRTV in Great Falls, Mont., and the WBUP/WBKP duopoly in Marquette, Mich. Entities concerned or investigating the hacks include FEMA, the FBI, the FCC, and state and local police.