Define and differentiate Vulnerability, Risk, and Threat
Define the term "Zero-Day Exploit". Discuss some recent examples where one or two ZDEs were used to bypass cybersecurity controls to open a hole in vulnerable Critical Infrastructures, SCADA systems, or Industrial Control Systems (ICS) so malicious code could enter to cause disruptive effects. Describe how ZDEs can possibly be used by nation states, criminals, and political extremists.