Equifaxs TALX division called The Work Number is designed to provide automated employment and income verification for prospective employers. The site asks visitors to enter your PIN, short for Personal Identification Number. In the vast majority of cases this appears to be little more than an eight-digit date of birth. Employers who contribute data to the service rely on horribly weak authentication for access to the information. Consumers have no privacy or security unless they possess both the awareness that this service exists and the forethought to access their account online.”]
Source: https://krebsonsecurity.com/2017/10/equifax-breach-fallout-your-salary-history/