Which statement best describes a cyber incident?

A cyber incident is best described as an event that threatens the integrity of information systems. This definition encompasses a wide range of occurrences, including unauthorized access, data breaches, malware infections, or any disruptive activity that compromises the confidentiality, integrity, and availability of data or systems.

The focus on threats highlights the potential impact such incidents can have on organizations, which may include financial loss, reputational damage, or legal consequences. Understanding this definition is crucial for individuals and organizations to prepare for, monitor, and respond effectively to potential cyber threats, which is a fundamental aspect of cybersecurity duties.

The other choices, while related to information security, do not fit the definition of a cyber incident. A planned security drill refers to proactive exercises carried out to improve preparedness and response, while a user training session is aimed at educating personnel about security practices. A database maintenance task does not inherently pose a threat to information systems and typically involves routine operational activities to ensure database performance.