Episode 4 — Glossary of common cybersecurity terms

Understanding cybersecurity language is fundamental to applying the CIS Controls effectively. Many terms describe foundational components of systems, threats, and defenses that appear throughout the framework. Asset refers to any device, software, or data that the organization must protect, while enterprise assets include servers, workstations, and IoT devices that store or process information. Vulnerability denotes a flaw that could be exploited by an adversary, and threat represents the potential source of that exploitation—whether a malicious actor, insider, or natural event. The term risk connects these two concepts, describing the likelihood and impact of a threat exploiting a vulnerability. Authentication identifies users through credentials such as passwords or tokens, whereas authorization determines what those users are permitted to access. Together, they form the foundation of identity and access management. Another key principle is least privilege, ensuring that users and systems only have the permissions necessary to perform their duties, thereby minimizing the damage from misuse or compromise.

Additional terms such as confidentiality, integrity, and availability—collectively known as the CIA triad—capture the three pillars of information security. Confidentiality safeguards data from unauthorized access, integrity ensures data accuracy and trustworthiness, and availability guarantees that information and systems remain accessible when needed. Incident response refers to the structured process of detecting, investigating, and mitigating security events, while vulnerability management encompasses identifying, prioritizing, and remediating weaknesses across systems. Understanding audit logs and monitoring is equally essential, as they provide visibility into activities that indicate compromise or policy violation. Each of these terms shapes the operational vocabulary of cybersecurity professionals. Mastery of this terminology enables more precise implementation of the CIS Controls, promotes alignment between business and technical stakeholders, and ensures consistent communication during audits, risk assessments, and incident investigations.
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