A point of failure in cybersecurity refers to any single component, process, or system whose malfunction or compromise can disrupt the entire operation or security of an organization. Identifying and mitigating points of failure is crucial for building resilient systems, as a single weak link can lead to widespread outages, data breaches, or loss of service. Common points of failure include unpatched software, single servers, or centralized authentication systems. Redundancy, regular testing, and robust incident response plans help minimize the risks associated with these vulnerabilities.