Which of the following NIST documents defines impact? Response:

NIST SP 800-53 focuses on 'Security and Privacy Controls for Information Systems and Organizations' but does not primarily define fundamental risk assessment terms like 'impact'.

NIST SP 800-26, 'Security Self-Assessment Guide for Information Technology Systems,' is an older document that provides a self-assessment framework but is not the definitive source for impact definitions.

NIST SP 800-30, 'Guide for Conducting Risk Assessments,' specifically defines and elaborates on the concept of impact within the framework of risk assessment, detailing how to categorize the magnitude of harm resulting from the exploitation of a vulnerability. This document provides the methodology for determining low, moderate, and high impact levels.

NIST SP 800-53A, 'Assessing Security and Privacy Controls in Federal Information Systems and Organizations,' provides assessment procedures for controls defined in 800-53, rather than defining 'impact'.