A cyberattack is a deliberate and malicious action targeting computer systems, networks, or digital infrastructure, often with the goal of stealing data, disrupting operations, or causing damage. These attacks can be carried out by individuals, criminal organizations, or state actors, and may involve methods such as phishing, malware, ransomware, or denial-of-service attacks. Cybersecurity threats have significant implications for financial markets, corporate operations, and national security, making them a critical focus for governments and businesses alike.