Cyber Incidents

A violation or imminent threat of violation of computer security policies, acceptable use policies, or standard security practices.
SOURCE: SP 800-61

Actions taken through the use of computer networks that result in an actual or potentially adverse effect on an information system and/or the information residing therein. See Incident.
SOURCE: CNSSI-4009

An occurrence that actually or potentially jeopardizes the confidentiality, integrity, or availability of an information system or the information the system processes, stores, or transmits or that constitutes a violation or imminent threat of violation of security policies, security procedures, or acceptable use policies.
SOURCE: FIPS 200; SP 800-53
SOURCE: CNSSI-4009