You work in cybersecurity lor a chain of retail stores. An employee in your security team has recently notified you of a potentially serious issue with the point of sale (POS) systems which run on the company s network Upon reviewing data being transmitted Irom the POS systems the employee has detected indicators that malware designed to scrape credit and debit card information is being run on the systems.

You immediately mobilize your cyber incident response team and begin investigating You discover thai the malware infection is widespread and that numerous stores are affected.

In the course of the investigation you discover the following information Which is the MOST likely vulnerability that led to this cybersecurity incident?