Hacker

nouncandidate·updated May 9, 2026

Unauthorized user who attempts to or gains access to an information system.

Framework senses

National Initiative for Cybersecurity Careers and Studies (NICCS) Cybersecurity Lexicon1 senseview framework →
§1
An unauthorized user who attempts to or gains access to an information system.
ISACA Cybersecurity Glossary1 senseview framework →
§1
An individual who attempts to gain unauthorized access to a computer system
Federal Financial Institutions Examination Council (FFIEC) IT Examination Handbook Infobase, Glossary1 senseview framework →
§1
An individual who attempts to break into a computer without authorization.
NISTIR 7298: Glossary of Key Information Security Terms, Revision 21 senseview framework →
§1
Unauthorized user who attempts to or gains access to an information system.
CNSSI-4009 (Glossary of Information Assurance Terms)1 senseview framework →
§1
Unauthorized user who attempts to or gains access to an information system.
Systems and software engineering —Vocabulary1 senseview framework →
§1
Technically sophisticated computer enthusiast who uses his or her knowledge and means to gain unauthorized access to protected resources.
Introduction I.5 Glossary of Basic Terms1 senseview framework →
§1
Unauthorized user who attempts to or gains access to an information system.