TheArtOfService
NIST SP 800-53 Rev 5NIST Cybersecurity Framework 2.0

NIST SP 800-53 Rev 5 covers 71.7% of NIST Cybersecurity Framework 2.0

76 of the 106 controls in NIST Cybersecurity Framework 2.0 are already satisfied by evidence you collected for NIST SP 800-53 Rev 5. 30 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.

71.7%
of the target already covered
76
controls evidenced
30
genuine gaps
318
claims rejected in review

This number is directional. It says how much of NIST Cybersecurity Framework 2.0 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.

464 candidate mappings were examined and 326 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.

PR - Protect19 of 22 evidenced, 3 to do
ID - Identify18 of 21 evidenced, 3 to do
Govern2 of 3 evidenced, 1 to do
GV - Govern18 of 28 evidenced, 10 to do
RC - Recover5 of 8 evidenced, 3 to do
RS - Respond8 of 13 evidenced, 5 to do
DE - Detect6 of 11 evidenced, 5 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-SI-4NIST-CSF-DE.AE-02argued against and upheld
Potentially adverse events are analyzed to better understand associated activities

SI-4 requires monitoring to detect attacks and analyzing indicators of potential events.

NIST800-AU-6NIST-CSF-DE.AE-02argued against and upheld
Potentially adverse events are analyzed to better understand associated activities

AU-6 requires analysis of audit records for indications of inappropriate activity.

NIST800-AU-6NIST-CSF-DE.AE-03argued against and upheld
Information is correlated from multiple sources

AU-6 requires correlating audit records across repositories to gain situational awareness.

NIST800-SI-4NIST-CSF-DE.CM-01argued against and upheld
Networks and network services are monitored to find potentially adverse events

SI-4 requires monitoring inbound and outbound network communications for adverse events.

NIST800-PE-6NIST-CSF-DE.CM-02argued against and upheld
The physical environment is monitored to find potentially adverse events

PE-6 requires monitoring physical access and responding to detected incidents.

NIST800-SI-4NIST-CSF-DE.CM-03argued against and upheld
Personnel activity and technology usage are monitored to find potentially adverse events

SI-4 requires monitoring for unauthorized use of the system by personnel.

NIST800-SA-9NIST-CSF-DE.CM-06argued against and upheld
External service provider activities are monitored to find potentially adverse events

SA-9 requires monitoring external provider control compliance on an ongoing basis.

NIST800-PM-11NIST-CSF-GV.OC-01argued against and upheld
Organizational context for cybersecurity risk management is understood

PM-11 requires defining mission and business processes with security risk considered.

Claims that did not hold

318 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-RA-10NIST-CSF-DE.AE-02
Potentially adverse events are analyzed to better understand associated activities

Not corroborated on review of this pair by Claude Code

Claimed at medium confidence before it was rejected.

NIST800-IR-5NIST-CSF-DE.AE-03
Information is correlated from multiple sources

Not corroborated on review of this pair by Claude Code

Claimed at medium confidence before it was rejected.

NIST800-IR-8NIST-CSF-DE.AE-04
Estimated impact and scope of adverse events are understood

Not corroborated on review of this pair by Claude Code

Claimed at medium confidence before it was rejected.

NIST800-IR-4NIST-CSF-DE.AE-06
Information on adverse events is provided to authorized staff

Not corroborated on review of this pair by Claude Code

Claimed at medium confidence before it was rejected.

NIST800-RA-10NIST-CSF-DE.AE-07
Cyber threat intelligence and contextual information are integrated into analysis

Not corroborated on review of this pair by Claude Code

Claimed at high confidence before it was rejected.

NIST800-SI-4NIST-CSF-DE.AE-07
Cyber threat intelligence and contextual information are integrated into analysis

Not corroborated on review of this pair by Claude Code

Claimed at low confidence before it was rejected.

NIST800-IR-5NIST-CSF-DE.AE-07
Cyber threat intelligence and contextual information are integrated into analysis

Not corroborated on review of this pair by Claude Code

Claimed at medium confidence before it was rejected.

NIST800-IR-1NIST-CSF-DE.AE-08
Incidents are declared when adverse events meet defined criteria

Not corroborated on review of this pair by Claude Code

Claimed at medium 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.

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