In September 2017, Equifax announced a cyber-security breach, which it claims to have occurred between mid-May and July 2017, where cybercriminals accessed approximately 145.5 million U.S. Equifax consumers' personal data, including their full names, Social Security numbers, birth dates, addresses, and driver license numbers. Equifax also confirmed at least 209,000 consumers' credit card credentials were taken in the attack. On March 1, 2018, Equifax announced that 2.4 million additional U.S. customers were affected by the breach, increasing the number of affected to 147.9 million Americans. The company claims to have discovered evidence of the cybercrime event on July 29, 2017. Residents in the United Kingdom (15.2 million) and Canada (about 19,000) were also impacted. The vulnerability in which Chinese hackers leveraged was , the hackers managed to stay in Equifax systems undetected for approximately 134 days.