Primary definition
Software that is secretly or surreptitiously installed into an information system to gather information on individuals or organizations without their knowledge; a type of malicious code. Source: NIST SP 800-53 Rev 4
Also known asstalkerware · snoopware · trackware · surveillance software · monitoring software
4 sources cited4 related termsReviewed Aug 10, 2026
— Committee on National Security Systems Glossary CNSSI 4009-2015View source
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CNSSGC
Software that is secretly or surreptitiously installed into an information system to gather information on individuals or organizations without their knowledge; a type of malicious code. Source: NIST SP 800-53 Rev 4
Committee on National Security Systems Glossary CNSSI 4009-2015 · 2024
Cite this term
Permanent URL · stable across revisions
Election Security Glossary. (2026). Spyware. In Election Security Glossary. Retrieved August 20, 2026, from https://electionsecurityglossary.com/glossary/spyware
Sources
4 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
NICCS Glossary
NICCS Glossary
Multi-source
03
The Cyber Glossary
The Cyber Glossary
Multi-source
04
An Investigation into Foreign Entities Who Are Targeting Servicemembers and Veterans Online
An Investigation into Foreign Entities Who Are Targeting Servicemembers and Veterans Online
Multi-source
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