A cyber event is any security-related occurrence that attracts attention from defenders, such as suspicious logins, malware detections, failed exploit attempts, unusual network traffic, or a service disruption. It is broader than a confirmed incident: an event may be real, benign, or only partially understood until analysts review it.
This distinction matters because security teams handle far more events than true incidents. In attacks, events are often the first signs of reconnaissance, phishing, brute force, or exploitation attempts. In defense, events come from monitoring tools, endpoint alerts, SIEM correlation, and user reports. Good triage turns event volume into useful signal: validate what happened, judge severity, and escalate only when evidence shows actual harm or a credible compromise. That keeps analysts from chasing noise while reducing the chance of missing a real attack.