Credit reporting giant Equifax said today that hackers had compromised the personal information of 143 million Americans.The data breach — one of the largest in history — exposed names, Social Security numbers, birth dates, mailing addresses, driver’s license numbers and 209,000 U.S. credit card numbers, Equifax said in a statement.The hack, which occurred between May and July, also compromised 182,000 Americans’ credit reporting dispute files, which contain sensitive information about their personal and financial histories.Hackers exploited a now-fixed website vulnerability to access the information, according to Equifax.The company said it had hired a “leading, independent cybersecurity firm” to recommend security improvements and was working with American law enforcement authorities to investigate the breach, which it discovered on July 29.The FBI did not immediately respond to an email asking whether it was assisting Equifax.The investigation also uncovered a limited breach of British and Canadian customers’ data.