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likelihood

Definitions:

  Chance of something happening.
Sources:
NIST SP 800-160v1r1 from ISO Guide 73
NIST SP 800-161r1-upd1 [11/1/2024 errata update] from ISO/IEC 27000:2018

  A weighted factor based on a subjective analysis of the probability that a given threat is capable of exploiting a given vulnerability or a set of vulnerabilities.
Sources:
NISTIR 7621 Rev. 1 under Likelihood from CNSSI 4009-2015 - “likelihood of occurrence”, NIST SP 800-30 Rev. 1

  chance of something happening
Sources:
NISTIR 8053