In downtown Chicago, Illinois, security analyst Mia Torres investigates a breach at Windy City Enterprises,...

The correct answer is D because the root cause of the breach was an unpatched, outdated Apache HTTP Server vulnerable to remote code execution. According to CEH principles under Security Operations and Incident Response, vulnerability management and risk assessment are critical components of defensive security strategy. An extensive risk assessment enables the organization to identify vulnerable assets, prioritize patching based on severity and business impact, and implement a structured remediation plan.

Risk assessment is part of the vulnerability management lifecycle, which includes asset identification, vulnerability scanning, risk evaluation, prioritization, patch management, and verification. By determining which systems are most exposed and critical, the organization can apply patches and security updates systematically, reducing the attack surface. Since the breach occurred due to a known vulnerability, proper patch management and regular security updates would have prevented exploitation.

Options A, B, and C represent hardening or segmentation techniques but do not directly address the core issue of outdated software vulnerabilities. Blocking ports and using dedicated machines are good security practices; however, they do not eliminate the risk of exploitation if the web server software itself remains unpatched. Therefore, implementing a comprehensive risk assessment process followed by prioritized patch management aligns directly with CEH-recommended best practices for preventing similar future incidents.