Penetration definition in Computer Security terms:

Acronym(s): None

Definition(s): See intrusion.
Source(s): CNSSI 4009-2015

Synonym(s): Intrusion
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


reference: CSRC Glossary