NIST SP 800-53 Rev 5NIST SP 800-172

NIST SP 800-53 Rev 5 covers 68.6% of NIST SP 800-172

24 of the 35 controls in NIST SP 800-172 are already satisfied by evidence you collected for NIST SP 800-53 Rev 5. 11 are genuine gaps. Every claim below was judged against both control sets and then argued against; the ones that did not survive are published further down with the reason each failed.

68.6%

of the target already covered

controls evidenced

genuine gaps

claims rejected in review

This number is directional. It says how much of NIST SP 800-172 your NIST SP 800-53 Rev 5 evidence satisfies. The reverse pair is a different number, often very different, because a security standard has enormous depth for access control and almost none for lawful basis or data subject rights.

48 candidate mappings were examined and 5 were removed. Signed off 2026-08-19, review level machine verified. Mappings were judged by Claude Code rather than read line by line by a practitioner. Every claim shows its reasoning so you can check it. Ask and a practitioner will review this pair.

Where the gaps are

Coverage is never evenly spread. A source standard usually satisfies one part of a target almost completely and barely touches another, and which part is which is the thing worth knowing before you plan the work.

IA3 of 3 evidenced

PS2 of 2 evidenced

CA1 of 1 evidenced

RA6 of 7 evidenced, 1 to do

SI6 of 7 evidenced, 1 to do

AC2 of 3 evidenced, 1 to do

CM2 of 3 evidenced, 1 to do

AT1 of 2 evidenced, 1 to do

SC1 of 5 evidenced, 4 to do

IR0 of 2 evidenced, 2 to do

Theme level, not control level, deliberately. The per-control list of what is evidenced and what is a gap is the report itself, so publishing it here would be publishing the thing being sold.

Claims that held

A sample. Each one names the control whose evidence does the work, the control it satisfies, and why.

NIST800-AC-203.1.2eargued against and upheld

Restrict Access to Organization-Owned, Provisioned, or Issued Information Resources

Terms for external systems restrict access to resources the organization owns or authorizes.

NIST800-AC-43.1.3eargued against and upheld

Employ Secure Information Transfer Solutions

Flow enforcement against approved authorizations controls transfers between security domains.

NIST800-RA-33.11.1eargued against and upheld

Threat-Aware Risk Assessment

Risk assessment identifying threats, likelihood and harm is the assessment the intelligence feeds.

NIST800-SI-53.11.1eargued against and upheld

Threat-Aware Risk Assessment

Security alerts and advisories from defined external sources are the threat intelligence intake.

NIST800-RA-103.11.2eargued against and upheld

Threat Hunting

A threat hunting capability searching for indicators of compromise that evaded controls matches exactly.

NIST800-PL-23.11.4eargued against and upheld

Security Solution Rationale Document

The security plan records the controls selected, the operational context and the rationale.

NIST800-CA-73.11.5eargued against and upheld

Assess Effectiveness of Security Solutions

Continuous monitoring sets the frequency for reassessing control effectiveness on new information.

NIST800-CA-23.11.5eargued against and upheld

Assess Effectiveness of Security Solutions

Control assessment against an approved plan establishes whether the solution is effective.

Claims that did not hold

5 proposed mappings for this pair were rejected. They are kept in the graph rather than deleted, so what was thrown out is as inspectable as what survived. A crosswalk that never rejects anything is not being judged.

NIST800-AC-43.13.1e

Create Diversity in System Components to Limit Malicious Code Propagation

judged against NIST SP 800-172 content that was corrected the same day. 3.13.2e now carries its issued requirement (introduce unpredictability into operations) not least privilege, and 3.14.3e carries scope inclusion or network segregation not supply chain provenance. Refuted 2026-08-19.