Incident

(IS) Assessed occurrence having actual or potentially adverse effects on an information system. (COMSEC) Occurrence that potentially jeopardizes the security of COMSEC material or the secure electrical transmission of national security information. An unusual occurrence or breach in the security of a computer system. An event that has actual or potentially adverse effects on an information system. A computer security incident can result from a computer virus, other malicious code, intruder, terrorist, unauthorized insider act, malfunction, etc. The occurrence of a system intrusion.