Incident

A violation or imminent threat of violation of computer security policies, acceptable use policies, or standard computer security practices.

In information systems (IS), [an] assessed occurrence having actual or potentially adverse effects on an IS. [INFOSEC-99] 2. In COMSEC, the occurrence that potentially jeopardizes the security of COMSEC material or the secure electrical transmission of national security information or information governed by 10 U.S.C. Section 2315. [INFOSEC-99]