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attack surface

nounverified·updated May 9, 2026

The set of points on the boundary of a system, a system element, or an environment where an attacker can try to enter, cause an effect on, or extract data from that system, system element, or environment. [19]

MWENIST SP 800-172r3

Senses

National Initiative for Cybersecurity Careers and Studies (NICCS) Cybersecurity Lexiconextended definition available

The set of ways in which an adversary can enter a system and potentially cause damage.

CPMI-IOSCO Guidance on Cyber Resilience for Financial Market Infrastructures

The sum of an information system’s characteristics in the broad categories (software, hardware, network, processes and human) which allows an attacker to probe, enter, attack or maintain a presence in the system and potentially cause damage to an FMI. A smaller attack surface means that the FMI is less exploitable and an attack less likely.

NIST SP 800-171r3attested usage pack match

No definition is given in NIST SP 800-171r3. The term is attested in use at 1 citation in that document; a definition is pending curation.

Classifications

Entity Type

Vulnerability85%llm-generatedllm:claude-haiku-4-5
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Sensitivity

95%llm-generatedllm:claude-haiku-4-5
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Information Class

95%llm-generatedllm:claude-haiku-4-5
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Variants

plural
attack surfaces
possessive
attack surface's
pluralpossessive
attack surfaces'