Get All Access for $5/mo

Target Hit by a Sophisticated Hack Job The retail company was targeted by hackers who may have tampered with the machines customers use to swipe their cards.

By Laura Entis

Opinions expressed by Entrepreneur contributors are their own.

Target acknowledged early this morning that it is investigating a security breach that may have compromised over 40 million credit and debit cards used by customers shopping at the discount retail chain from November 27 to December 15, a period that included Black Friday.

This wasn't your run-of-the mill hack. The thieves targeted physical store locations (online was not affected) on a national scope. The hackers were able to access credit and debit-card data found on the magnetic strips by comprising approximately 40,000 card devices at store registers, the Wall Street Journal reported

Who carried out the hack remains unclear. Stolen data included customer names, credit, debit and Target store brand card numbers, expiration dates and CVV codes.

"You should remain vigilant for incidents of fraud and identity theft by regularly reviewing your account statements and monitoring free credit reports," the company said in a letter to its customers.

Related: How to Avoid Getting Hacked (Infographic)

This is far from the first major retailer breaches. Back in 2007, TJX -- the company behind T.J. Maxx and Marshalls - acknowledged its systems had been compromised when hackers used the store's wireless networks to access information connected to payment card, check and return transactions at TJX locations nationwide. Data from over 45 million credit and debit cards was stolen.

And in July, credit card numbers from over 160 accounts were stolen from companies including J.C. Penny and 7-Eleven.

But the timing of this particular attack was, unfortunately, impeccable. Black Friday is America's biggest shopping weekend of the year, when store traffic is at its highest.

At least Target doesn't have to sit alone with its "hacked" status. Yesterday, news broke that hackers had breached the Washington Post's servers (for the third time this year), making off with employee usernames and passwords.

Related: New York Times Hacked: 3 Tips for Avoiding Email Scams

Laura Entis

Staff Writer. Frequently covers tech, business psychology, social media, startups and digital advertising.

Laura Entis is a staff writer at Entrepreneur.com.

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

Editor's Pick

Starting a Business

How to Find the Right Programmers: A Brief Guideline for Startup Founders

For startup founders under a plethora of challenges like timing, investors and changing market demand, it is extremely hard to hire programmers who can deliver.

Fundraising

Working Remote? These Are the Biggest Dos and Don'ts of Video Conferencing

As more and more businesses go remote, these are ways to be more effective and efficient on conference calls.

Growing a Business

You Need an Advisory Team More Than Ever. Here's Why — and How to Run One Effectively.

The right advice, particularly in a company's early stages, can be an existential matter: how to surround yourself with the right minds.

Growing a Business

The Best Way to Run a Business Meeting

All too often, meetings run longer than they should and fail to keep attendees engaged. Here's how to run a meeting the right way.

Business Ideas

63 Small Business Ideas to Start in 2024

We put together a list of the best, most profitable small business ideas for entrepreneurs to pursue in 2024.

Growing a Business

4 Financial Blind Spots That Could Be Preventing You From Making More Money

If you're ready to grow but feel stagnated and not sure why, check out these common money secrets where revenue is hiding.