Definition
An attack is a deliberate, unauthorized action taken by an individual or group to exploit vulnerabilities in a system, network, or application. These actions aim to compromise the confidentiality, integrity, or availability of data and services. Attacks often leverage known weaknesses or newly discovered exploits to gain access, disrupt operations, or steal sensitive information. Understanding attack vectors and methodologies is crucial for designing robust security defenses and responding effectively to security incidents. For instance, a phishing attack attempts to trick users into revealing credentials through deceptive emails. Unlike a vulnerability, which is a weakness, an attack is the active exploitation of that weakness. This concept is fundamental to cybersecurity certifications like CompTIA Security+ and CySA+.