TheArtOfService
ISO 27001:2022NIST SP 800-53 Rev 5

ISO 27001:2022 covers 54.3% of NIST SP 800-53 Rev 5

163 of the 300 controls in NIST SP 800-53 Rev 5 are already satisfied by evidence you collected for ISO 27001:2022. 137 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.

54.3%
of the target already covered
163
controls evidenced
137
genuine gaps
336
claims rejected in review

This number is directional. It says how much of NIST SP 800-53 Rev 5 your ISO 27001:2022 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.

536 candidate mappings were examined and 342 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.

CA - Assessment, Authorization, and Monitoring7 of 8 evidenced, 1 to do
AT - Awareness and Training4 of 5 evidenced, 1 to do
CM - Configuration Management11 of 14 evidenced, 3 to do
IR - Incident Response7 of 9 evidenced, 2 to do
PS - Personnel Security7 of 9 evidenced, 2 to do
PE - Physical and Environmental Protection17 of 22 evidenced, 5 to do
CP - Contingency Planning9 of 12 evidenced, 3 to do
MP - Media Protection6 of 8 evidenced, 2 to do
AC - Access Control17 of 23 evidenced, 6 to do
AU - Audit and Accountability11 of 15 evidenced, 4 to do
MA - Maintenance5 of 7 evidenced, 2 to do
IA - Identification and Authentication8 of 13 evidenced, 5 to do
RA - Risk Assessment5 of 9 evidenced, 4 to do
SR - Supply Chain Risk Management6 of 12 evidenced, 6 to do
SA - System and Services Acquisition8 of 17 evidenced, 9 to do
SI - System and Information Integrity10 of 22 evidenced, 12 to do
SC - System and Communications Protection14 of 47 evidenced, 33 to do
PM - Program Management9 of 32 evidenced, 23 to do
PL - Planning2 of 8 evidenced, 6 to do
PT - PII Processing and Transparency0 of 8 evidenced, 8 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.

5.1NIST800-AC-1argued against and upheld
Access control policy and procedures

Policies for information security include the access control policy required.

8.1NIST800-AC-11argued against and upheld
Device lock

End point device rules configure the device lock behaviour.

7.7NIST800-AC-11argued against and upheld
Device lock

Clear screen requirements lock unattended devices.

7.7NIST800-AC-12argued against and upheld
Session control

Clear screen requirements end sessions left unattended.

5.13NIST800-AC-16argued against and upheld
Security and Privacy Attributes. Provide the means to associate [organization-defined] with [organization-defined] for information in storage, in process, and/or in transmission; Ensure that the attribute associations are made and retained with the information; Establish

Labelling of information binds security attributes to information.

5.12NIST800-AC-16argued against and upheld
Security and Privacy Attributes. Provide the means to associate [organization-defined] with [organization-defined] for information in storage, in process, and/or in transmission; Ensure that the attribute associations are made and retained with the information; Establish

Classification defines the attribute values that get bound.

6.7NIST800-AC-17argued against and upheld
Remote access

Remote working controls are this remote access control.

8.20NIST800-AC-18argued against and upheld
Wireless access

Networks security governs wireless network access and protection.

Claims that did not hold

336 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.

8.3NIST800-AC-1
Access control policy and procedures

retired metered-API path. 56 percent of its output was refuted wherever it was re-judged, so its residue is not trusted evidence. Superseded by judgement on the Claude Max plan 2026-08-19.

Claimed at medium confidence before it was rejected.

5.15NIST800-AC-1
Access control policy and procedures

Held back 2026-08-19. Generated by the retired metered path, refuted at 56 percent wherever re-judged. Pair pulled from sale pending a rebuild on the Max plan.

Claimed at high confidence before it was rejected.

8.3NIST800-AC-19
Access control for mobile devices

retired metered-API path. 56 percent of its output was refuted wherever it was re-judged, so its residue is not trusted evidence. Superseded by judgement on the Claude Max plan 2026-08-19.

Claimed at medium confidence before it was rejected.

8.5NIST800-AC-19
Access control for mobile devices

retired metered-API path. 56 percent of its output was refuted wherever it was re-judged, so its residue is not trusted evidence. Superseded by judgement on the Claude Max plan 2026-08-19.

Claimed at medium confidence before it was rejected.

8.3NIST800-AC-4
Information flow enforcement

Held back 2026-08-19. Generated by the retired metered path, refuted at 56 percent wherever re-judged. Pair pulled from sale pending a rebuild on the Max plan.

Claimed at high confidence before it was rejected.

6.3NIST800-AT-1
Policy and procedures for awareness and training

Held back 2026-08-19. Generated by the retired metered path, refuted at 56 percent wherever re-judged. Pair pulled from sale pending a rebuild on the Max plan.

Claimed at high confidence before it was rejected.

6.3NIST800-AT-6
Training feedback

retired metered-API path. 56 percent of its output was refuted wherever it was re-judged, so its residue is not trusted evidence. Superseded by judgement on the Claude Max plan 2026-08-19.

Claimed at medium confidence before it was rejected.

8.15NIST800-AU-1
Policy and procedures for audit and accountability

Held back 2026-08-19. Generated by the retired metered path, refuted at 56 percent wherever re-judged. Pair pulled from sale pending a rebuild on the Max plan.

Claimed at high confidence before it was rejected.

The full report

Everything above is a sample. The report is every evidenced control and every gap, with the reasoning and the source document behind each one, in a form you can hand to an assessor. $299, emailed immediately.

Buy this crosswalk