You can be on Entrepreneur’s cover!

Another Hack: Jimmy John's Is the Latest Chain to Suffer a Data Breach Approximately 216 Jimmy John's stores have been affected in the latest of a growing number of hacking incidents.

By Kate Taylor

entrepreneur daily

Opinions expressed by Entrepreneur contributors are their own.

After weeks and months of high-profile data breaches, another one has emerged: this time, at Jimmy John's.

The sandwich franchise announced on Wednesday that customers' credit and debit card data was compromised after an intruder store stole log-in credentials from the chain's payments-system vendor. The hacker then used the stolen credentials to access point-of-sale systems at approximately 216 stores.

Both corporate and franchised locations were affected by the data breach, which lasted from June 16 to September 5. Jimmy John's has assembled a list of which stores were affected, during what periods of time.

Related: Why Uncovering a Network Security Breach Can Take Weeks or Months

The chain reports that the breach has now been contained, and that it is currently safe to use credit and debit cards in Jimmy John's stores.

Jimmy John's says that it has already taken steps to prevent future security breaches, including installing encrypted swipe machines, updating systems and reviewing its policies and procedures for third party vendors. The company is additionally offering affected customers identity protection services.

Jimmy John's joins an extensive list of chains hacked in 2014. Earlier in September, Home Depot reported 56 million credit and debit cards were put at risk in a cyberattack on its payment terminals. Other chains hit by hackers this year include Neiman Marcus, P.F. Chang's and Michaels. Jimmy John's has not indicated that its data breach is connected to incidents at other companies.

Related: Home Depot Reports Bigger Breach Than Target; Criminals Used Custom Malware

Kate Taylor

Reporter

Kate Taylor is a reporter at Business Insider. She was previously a reporter at Entrepreneur. Get in touch with tips and feedback on Twitter at @Kate_H_Taylor. 

Want to be an Entrepreneur Leadership Network contributor? Apply now to join.

Editor's Pick

Leadership

How to Enhance Your Leadership Skills and Transform Your Team With This Ancient (but Powerful) Method

This leadership approach could revolutionize your workplace. Here's what you need to know.

Growing a Business

They Designed One Simple Product With a 'Focus on Human Health' — and Made $40 Million Last Year

Marilee Nelson, Allison Evans and Kelly Love founded cult-favorite cleaning brand Branch Basics in 2012.

Starting a Business

6 Effective Funding Strategies for Startups

Navigating startup financing is complex. Entrepreneurs find themselves at the crossroads of innovation and survival, where a single decision can either fuel their dreams or extinguish their aspirations. Here we look at six ways you can finance your startup to support your business for long-term success.

Leadership

This Leadership Technique is the Secret to Optimal Team Performance

Through my experience in business, I've found one particular leadership technique that works better than others.

Real Estate

5 Must-Try Real Estate Marketing Ideas That Will Attract Buyers

By pursuing content marketing, real estate professionals grow their reputation and lay the foundation for future sales.