ethical-hacker video for a post-breach forensic investigation determined that a known vulnerability in Apache Struts was responsible for the Equifax data
A post-breach forensic investigation determined that a known vulnerability in Apache Struts was responsible for the Equifax data breach, which impacted 147 million individuals in September 2017. Despite a fix being available from the software vendor for several months before the intrusion, it was not applied. Which security process failed in this scenario?