https://www.reuters.com/article/us-equifax-breach/equifax-failed-to-patch-security-vulnerability-in-march-former-ceo-idUSKCN1C71VY >Equifax Inc was alerted in March to the software security vulnerability that led to hackers obtaining personal information of more than 140 million Americans but took months to patch it, its former CEO said in testimony to be delivered to Congress on Tuesday.