20 of the Worst Data Security Breaches to Date

Each passing month seems to reveal a bigger internet security problem than the last — exposing personal and financial data, and threatening businesses and customers.

20. T-Mobile: Data from 15 million customers is compromised

T-Mobile store front and pedestrians.Northfoto / Shutterstock.com

Hackers captured data of 15 million T-Mobile customers by attacking the company that processes T-Mobile credit checks. In the fall of 2015, credit reporting agency Experian reported a breach lasting from Sept. 1, 2013, to Sept. 6, 2015. The stolen information included names, birthdates, addresses and Social Security numbers, but it did not include credit card or payment information, reported CNET. Anyone who went through a credit check was at risk.

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