A security event, or a combination of multiple security events, that constitutes a security incident in which an intruder gains, or attempts to gain, access to a system or system resource without having authorization to do so.
Source(s):
CNSSI 4009-2015
[Superseded]
under intrusion
from
IETF RFC 4949 Ver 2
See intrusion.
Source(s):
CNSSI 4009-2015
[Superseded]