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 is a reporter for Fortune.com's Venture section.

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

Side Hustle

The Side Hustle He Started in His College Apartment Turned Into a $70,000-a-Month Income Stream — Then Earned Nearly $2 Million Last Year

Kyle Morrand and his college roommates loved playing retro video games — and the pastime would help launch his career.

Business News

Homeowners in These 10 States Pay the Most in 'Hidden' Upkeep Costs

Hidden home costs pile on top of mortgage payments.

Growing a Business

5 Books to Help You Motivate, Unify and Build Perspective

In a post-Covid world, check out these must-read books to help build a more resilient organization, create a modern work culture and maintain a powerful growth mindset.

Money & Finance

Avoid These 10 Mistakes Entrepreneurs Make with Money

Despite the challenging statistic that only 5% of startups survive beyond five years, common financial pitfalls often contribute to their failure. Through personal observation, I've identified the prevalent financial mistakes made by entrepreneurs.

Growing a Business

How Visionary Leaders Transform Curiosity Into Groundbreaking Ideas

Lee Brian Schrager, founder of the South Beach Wine & Food Festival, discusses the spark that launched FoodieCon, his best practices for running popular food events, and why all business owners need to adapt to social media trends.

Making a Change

Learn All of Rosetta Stone's Languages for $152

A lifetime subscription is nearly $250 off for a limited time.