The credit rating and reporting firm Equifax revealed new details about the security breach that exposed the personal details of over 143 million users. Equifax also announced the immediate retirement of two high-ranking executives. The breach came to light on July 29 when its security team observed suspicious traffic from its US online dispute portal. The company realized that attackers breached the server via a vulnerability in the Apache Struts Java framework that it was powering the underlying US online. After patching the application, Equifax brought the web portal back online, but the next day more suspicious activity was discovered.
Source: https://www.bleepingcomputer.com/news/security/equifax-releases-new-information-about-security-breach-as-top-execs-step-down/