Primary definition
An event involving the exposure of information to entities not authorized access to the information. Source: NIST SP 800-57 Part 3
Also known asdata leak · information spill · exposure of sensitive information · breach of confidentiality · unauthorized data exposure · info leak
2 sources cited4 related termsReviewed Aug 10, 2026
— Committee on National Security Systems Glossary CNSSI 4009-2015View source
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CNSSGC
An event involving the exposure of information to entities not authorized access to the information. Source: NIST SP 800-57 Part 3
Committee on National Security Systems Glossary CNSSI 4009-2015 · 2024
Cite this term
Permanent URL · stable across revisions
Election Security Glossary. (2026). Unauthorized Disclosure. In Election Security Glossary. Retrieved August 22, 2026, from https://electionsecurityglossary.com/glossary/unauthorized-disclosure
Sources
2 cited · last checked Aug 10, 2026
01
Committee on National Security Systems Glossary CNSSI 4009-2015
Committee on National Security Systems Glossary CNSSI 4009-2015
High consensus
02
The Cyber Glossary
The Cyber Glossary
Multi-source
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