Hundreds of ADT customers are suing the home-security firm after it admitted that a former employee gained unauthorized access to their systems over the last several years—including the live video streams of their in-home cameras. Two federal class-action lawsuits have been filed on behalf of the customers, The Dallas Morning News reports. The employee was able to add his email address to customers’ accounts during home-service visits, according to the company. With his email address added to the accounts, he was then able to use the company’s mobile app to snoop on in-home security cameras. “Moments once believed to be private and inside the sanctity of the home are now voyeuristic entertainment for a third party,” the lawsuits state. “And worse, those moments could have been captured, shared with others, or even posted to the internet.” ADT reportedly fired the employee after discovering the abuse, and said it brought in measures to prevent a similar incident from taking place in the future.