Breach potentially affects millions of email addresses, the BBC reports.
Email service provider Epsilon disclosed that a hacker accessed its client accounts.
The BCC said today the breach could potentially affect millions of email addresses. Epsilon sends more than 40 billion email messages on behalf of its 2,500 clients each year.
Epsilon, in an April 1 statement on its website, said it discovered that a "subset of Epsilon clients' customer data were exposed by an authorized entry" into its email system. "The information that was obtained was limited to email addresses and/or customer names only. A rigorous assessment determined that no other personal identifiable information associated with those names was at risk," Epsilon stated.
Epsilon did not disclose the names of the companies affected by the breach.
The BBC said many Epsilon customers have been contacted about the hack. Those companies, such as TiVo, Best Buy, and Capital One, are alerting their customers to beware of email messages requesting more personal information.
Disney Destination was also notified, according to the Orlando Sun-Sentinel. Disney spokeswoman Zoraya Suarez told the newspaper that Disney officials are "disappointed" that someone was able to get access to some of their guests' e-mail addresses.
"I cannot comment beyond what's posted on the website," said Jessica Simon, an Epsilon spokeswoman, when asked if the breach could potentially affect millions of email addresses. "We're conducting a full investigation and cooperating with authorities."
Want to learn more?
Attend ClickZ Live New York March 30 - April 1. With over 15 years' experience delivering industry-leading events, ClickZ Live brings together over 60 expert speakers to offer an action-packed, educationally-focused agenda covering all aspects of digital marketing. Register today!
Anna Maria Virzi, ClickZ's executive editor from 2007 until 2012, covered Internet business and technology since 1996. She was on the launch team for Ziff Davis Media's Baseline and also worked at Forbes.com, Web Week, Internet World, and the Connecticut Post.
Singapore, 5-6 March
Bangkok, 17-18 March
Hong Kong, April 2015
A Buyer's Guide to Affiliate Management Software
Manage your performance marketing with the right solution. Choose a platform that will mutually empower advertisers and media partners!
Google My Business Listings Demystified
To help brands control how they appear online, Google has developed a new offering: Google My Business Locations. This whitepaper helps marketers understand how to use this powerful new tool.
March 24, 2015
12:00pm ET/9:00am PT