https://arstechnica.com/information-technology/2017/09/so-equifax-says-your-data-was-hacked-now-what/

Yesterday, the credit reporting agency Equifax revealed that the personal data of 143 million US consumers, as well as "limited personal information for certain UK and Canadian residents," was exposed by an attack exploiting security flaws in the company's website. Social Security numbers, dates of birth, addresses, and some drivers license numbers were all exposed—information which could be used to pose as individuals to gain access to financial accounts, open new ones in their names, or file fraudulent tax returns.