https://www.theverge.com/2017/9/19/16332096/new-evidence-raises-doubts-about-executives-handling-equifax-breach

New evidence calls into question Equifax’s handling of the breach reported last week, which compromised 143 million user details including Social Security numbers, birthdates, and addresses.

Equifax discovered a breach of its computer systems in March, months earlier than it previously admitted to, reports Bloomberg, citing three people with knowledge of the matter. The relationship between the two breaches is unclear, but one source Bloomberg spoke to said the breaches involve the same intruders. Both hacks appear to have exploited the same vulnerability in Apache software that Equifax didn’t fully patch until it was too late.