The mitigation of violations of security policies and recommended practices.
Sources:
CNSSI 4009-2015
See incident handling.
Sources:
CNSSI 4009-2015
under incident response
An IT security incident is an adverse event in a computer system or network caused by the failure of a security mechanism or an attempted or threatened breach of these mechanisms
Sources:
NIST SP 800-35
under Incident Handling
The remediation or mitigation of violations of security policies and recommended practices.
Sources:
NIST SP 800-61r3
under incident response
from
PL 113-283 (FISMA)