The company has apologized for an email the company sent to customers on Tuesday that said a hacker had “exploited” a vulnerability in its network.
Comcast said that while the email was sent out to customers, the information was not intended to harm anyone.
The company said that the email, sent to its email system, had not been intended to identify a customer or its information.
Comcast’s president of corporate communications, Joe Garofalo, said Tuesday that the company is “looking into this matter.”
He said that employees were sent an email from a Comcast customer support representative that included the phrase “hacker has exploited our system,” adding that he did not know who the customer was.
“This is something we have been investigating,” Garofala said.
Comcast was one of several U.S. internet service providers that have been targeted by hackers in recent years.
The hackers have used a variety of techniques, including breaking into computer networks and installing malicious software.
Comcast, which provides internet service to about 3 million people, is the second-largest U.K.-based broadband provider.
The hacker’s email was apparently sent in response to Comcast’s efforts to find out who had accessed the Comcast network and to fix the vulnerability.