Time Warner Cable has revealed that sensitive data belonging to hundreds of thousands of customers may have been compromised.

Eric Mangan, Time Warner Cable's director of public relations, said approximately 320,000 customers across multiple markets could be impacted by the situation. The company was notified by the FBI that e-mail addresses and associated passwords may have been at risk although there's no direct evidence of an actual breach.

Specifically, customers with Roadrunner e-mail accounts may be at risk.

Time Warner Cable sent alerts to customers this week, urging them to change their e-mail passwords out of an abundance of caution. The ISP said it hasn't yet determined how a breach may have occurred but suggested it may have been the result of a phishing attack or a breach at a third-party that stores its customers' data.

As VentureBeat reminds us, Time Warner Cable has been down a bumpy road as of late. The ISP has experienced multiple outages over the last few months including one before and on New Year's Day.

Things have been equally as turbulent on the business side as well. Time Warner Cable blew more than $200 million as part of its failed merger with Comcast last year, only to be scooped up by Charter Communications shortly after which valued the ISP at $78.8 billion.

Image via Patrick T. Fallon, Bloomberg