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Practitioners — Public Auditors · Last updated 11 Jun 2026 · methodology v2.3 · Hallucination Register
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AI Hallucination on Guidance on Cyber Resilience for Financial Market Infrastructures for Public Auditors in international jurisdictions

Public Auditors: AI summaries of CPMI-IOSCO Cyber Resilience Guidance may understate professional obligations

Public auditors testing FMI cyber-resilience controls and audit clients exposed to the CPMI-IOSCO 2016 Cyber Guidance are increasingly using AI to draft testing programmes, populate working-paper regulatory criteria sections, and prepare management-letter findings citing the 2016 framework. In practice, AI is used to draft testing programmes for FMI cyber controls, populate the regulatory criteria section of audit working papers, prepare management-letter findings citing CPMI-IOSCO 2016 expectations, and generate cyber-control walkthroughs against the 2016 guidance categories.

That workflow places the regulator-issued text of the 2016 guidance, its 2018-2020 derivative standards, and its current operative status at the centre of every AI-generated deliverable for public auditors.

Two frontier AI models tested by the RegLeg Brief Specialist Panel produced confident, citable reconstructions of the CPMI-IOSCO 2016 Cyber Guidance (June 2016) that the regulator-issued primary text directly contradicts across nine findings spanning four failure classes: Source-Credit Fabrication (an asserted NIST Cybersecurity Framework citation that the 2016 guidance does not contain), Misattribution (the slogan 'secure the periphery, protect the core' located inside CPMI-IOSCO 2016 guidance or its 2018 wholesale-payments paper rather than the actual 2018 speech source), Anachronistic Cross-Reference (the 2016 guidance asserted as definitionally aligned with the November 2018 FSB Cyber Lexicon and the October 2020 FSB Effective Practices that postdate it), and Outdated Standing Claim (the 2016 guidance presented as the unchanged operative standard when CPMI-IOSCO has issued a May 2026 consultative document under active revision).

Questions are prepared by the RLB Specialist Panel based on real practical AI usage in the workflows public auditors use AI for. The Panel binds each AI finding to verbatim regulator-issued source text held as primary substrate.

For public auditors testing FMI cyber controls, the failure pattern is operationally consequential. A regulatory-criteria section that records an asserted NIST CSF citation in the 2016 guidance documents the audit's reference framework on a wrong reading of the source. A testing programme that records the 2016 guidance as containing operational depth for forensic analysis or a cyber-attack database points the auditor at a specification level the 2016 text does not contain. A management-letter finding that records the 2016 guidance as the unchanged operative standard misstates the regulatory horizon at the reporting date.

The audit's nine findings are documented with immutable RLB Citation IDs. Representative entries include RLB-H-INT-BIS-CPMI-IOSCO-CYBER-RESILIENCE-FMI-2016-Q008-Opus47, RLB-H-INT-BIS-CPMI-IOSCO-CYBER-RESILIENCE-FMI-2016-Q008-Sonnet46, RLB-H-INT-BIS-CPMI-IOSCO-CYBER-RESILIENCE-FMI-2016-Q014-Opus47, RLB-H-INT-BIS-CPMI-IOSCO-CYBER-RESILIENCE-FMI-2016-Q014-Sonnet46, RLB-H-INT-BIS-CPMI-IOSCO-CYBER-RESILIENCE-FMI-2016-Q019-Sonnet46, RLB-H-INT-BIS-CPMI-IOSCO-CYBER-RESILIENCE-FMI-2016-Q020-Opus47, RLB-H-INT-BIS-CPMI-IOSCO-CYBER-RESILIENCE-FMI-2016-Q020-Sonnet46, RLB-H-INT-BIS-CPMI-IOSCO-CYBER-RESILIENCE-FMI-2016-Q022-Opus47, and RLB-H-INT-BIS-CPMI-IOSCO-CYBER-RESILIENCE-FMI-2016-Q022-Sonnet46. The full audit is documented at the CPMI-IOSCO 2016 Cyber Resilience Guidance hub on RegLegBrief.com.

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Executive Summary

The CPMI-IOSCO 2016 Cyber Resilience Guidance is the international FMI cyber standard, and it sits at the centre of cyber-programme posture work for public auditors performing statutory and regulatory audits of FMIs, supervised payment institutions, and banks whose cyber programmes are tested against the international standard. Across 9 findings in this cell, AI models on web search produced confident answers on the regulator-framework alignment, the strategic provenance of CPMI cyber language, the depth of incident response and recovery content, the definitional consistency of cyber-resilience terminology with the 2018 FSB Cyber Lexicon, and the operative status of the 2016 guidance.

Each answer recorded a position the source documents do not support, and each one converts into audit report exposure on cyber programme framework alignment and operative-standard status when the AI output enters a Public Auditors deliverable without verification.

How AI gets this regulation wrong

The 9 findings cluster across 3 failure modes on the 2016 guidance. The models inferred regulator-framework cross-references that the source does not establish, misattributed regulator strategic language to the wrong publication, overstated the operational depth of the 2016 standard against later FSB work, asserted definitional consistency with the FSB Cyber Lexicon across a two-year publication gap, and missed the active CPMI-IOSCO revision cycle opened by the May 2026 consultative document. The table below maps each finding to its failure mode.

AI's Failure ModeCountAffected findings
Inference Drift1Finding#1
Inference Drift1Finding#2
Misattributed2Finding#3 · Finding#4
Misattributed1Finding#5
Inference Drift1Finding#6
Inference Drift1Finding#7
Outdated1Finding#8
Outdated1Finding#9

What that means for your practice

For Public Auditors working with the 2016 guidance, every failure in this cell feeds into the same risk concentration: audit report exposure on cyber programme framework alignment and operative-standard status. The table below shows how that risk distributes across the individual findings; whether the underlying fault was an asserted regulator-framework alignment, a misattributed strategic phrase, or a missed revision cycle, the deliverable exposure for the advising Public Auditors is materially the same.

Risk ImpactCountAffected findings
Wrong deliverable on cybersecurity framework alignment2Finding#1 · Finding#2
Wrong deliverable from misattributed regulator phrase2Finding#3 · Finding#4
Wrong deliverable on incident response and recovery scope1Finding#5
Wrong deliverable on definitional alignment with FSB Lexicon1Finding#6
Wrong deliverable on definitional derivation from FSB Lexicon1Finding#7
Outdated deliverable on the current operative cyber guidance2Finding#8 · Finding#9

When this affects Public Auditors

Public Auditors encounter the 2016 CPMI-IOSCO Cyber Resilience Guidance across statutory audit work on cyber-programme control adequacy, ISAE 3000 / 3402 engagements on cyber and operational resilience controls, regulator-directed audit work, audit committee reporting on cyber programme status, and CPMI-IOSCO alignment testing during programme inspections. AI tools enter the work at the moments where Public Auditors are drafting work programmes referencing the international standard, scoping notes on which CPMI-IOSCO categories map to control objectives, audit-evidence reviews on whether management has cited the correct regulator framework, and audit-committee communications on the operative status of the standard.

The specific findings in this cell map onto the question types that show up most often in Public Auditors work on cyber-programme posture. Two question pairs test the regulator-framework cross-reference question: whether the 2016 guidance aligns explicitly with the NIST Cybersecurity Framework, and whether definitions in the 2016 guidance match the November 2018 FSB Cyber Lexicon. Both pairs produced confident asserted alignments that the source text does not establish.

Two further question pairs test the regulator strategic provenance and revision-status questions: the source of the phrase 'secure the periphery, protect the core', and whether the 2016 guidance remains the operative standard. Both pairs missed the actual regulator record, attributing the phrase to the wrong publication and missing the May 2026 consultative document. A fifth question on the operational depth of incident response and recovery returned content from FSB 2020 'Effective Practices' as if it were content of the 2016 standard.

The findings at a glance

The table below lists each finding from the CPMI-IOSCO Cyber Resilience Guidance tested in this cell, showing the question area, the AI failure mode, and the citation identifier.

#Finding titleTypeCitation ID
1NIST Cybersecurity Framework cross-reference asserted without verificationHallucinationRLB-H-INT-BIS-CPMI-IOSCO-CYBER-RESILIENCE-FMI-2016-Q008-Opus47
2NIST Cybersecurity Framework citation asserted as explicitHallucinationRLB-H-INT-BIS-CPMI-IOSCO-CYBER-RESILIENCE-FMI-2016-Q008-Sonnet46
3'Secure the periphery, protect the core' misattributed to 2018 wholesale-payments workHallucinationRLB-H-INT-BIS-CPMI-IOSCO-CYBER-RESILIENCE-FMI-2016-Q014-Opus47
4'Secure the periphery, protect the core' misattributed to May 2019 BIS-CPMI speechHallucinationRLB-H-INT-BIS-CPMI-IOSCO-CYBER-RESILIENCE-FMI-2016-Q014-Sonnet46
5Operational depth of incident response and recovery overstated against FSB 2020 workHallucinationRLB-H-INT-BIS-CPMI-IOSCO-CYBER-RESILIENCE-FMI-2016-Q019-Sonnet46
6Cyber resilience definition asserted consistent with later FSB Cyber LexiconHallucinationRLB-H-INT-BIS-CPMI-IOSCO-CYBER-RESILIENCE-FMI-2016-Q020-Opus47
7FSB Cyber Lexicon derivation claim added beyond the source textHallucinationRLB-H-INT-BIS-CPMI-IOSCO-CYBER-RESILIENCE-FMI-2016-Q020-Sonnet46
82016 guidance presented as unrevised in 2026, missing the May 2026 consultationHallucinationRLB-H-INT-BIS-CPMI-IOSCO-CYBER-RESILIENCE-FMI-2016-Q022-Opus47
92016 guidance presented as ongoing monitoring only, missing the May 2026 consultative documentHallucinationRLB-H-INT-BIS-CPMI-IOSCO-CYBER-RESILIENCE-FMI-2016-Q022-Sonnet46

Aggregate impact

Taken together, the 9 findings describe a consistent generation pattern on the 2016 guidance: the model produces confident framework-alignment and provenance answers without grounding them in the source text, and misses regulator revision activity that breaks the assumption the 2016 guidance is the standing operative standard. For the 2016 guidance specifically, three structural drivers compound the failure modes.

First, the guidance is a principles-based document whose category structure (governance, identification, protection, detection, response and recovery, situational awareness, learning and evolving) is structurally similar to the NIST CSF five functions, which makes the wrong assertion of an explicit NIST citation look plausible. Second, the FSB and BIS publication streams around cyber resilience are dense and overlapping (the 2018 FSB Cyber Lexicon, the 2020 FSB 'Effective Practices' paper, Cœuré's 2018 speech, the 2018 wholesale-payments fraud work, the Level 3 monitoring reports), which makes provenance attribution easy to get wrong.

Third, CPMI-IOSCO's revision cycle on the 2016 guidance opened publicly on 6 May 2026 with a consultative document; models with a January 2026 cutoff will record the guidance as standing without active revision unless a retrieval step pulls the BIS press release stream for the deliverable period.

For Public Auditors, the practical effect is that any deliverable referencing the 2016 guidance, any regulator-framework alignment passage, any cyber-strategy provenance line, and any horizon-scanning entry on the operative status of the standard needs to be verified against the source documents and against the BIS press release stream for the deliverable period before it leaves the team.

What your team should do

The default position for Public Auditors working on the 2016 guidance should be that AI tools are useful for first-pass structuring and unsafe for any specific regulator-framework cross-reference, provenance, definitional, or revision-status claim. Programme references must be checked against the published 2016 guidance, not inferred from AI framing. Where management cites NIST CSF or FSB Cyber Lexicon alignment, the audit team should test that against the cited regulator document directly.

Where management states the 2016 guidance is the operative standard, the audit team should verify against the BIS press release stream for the audit period and flag any open consultation as a subsequent event.

For practical safeguards: when an AI tool supplies a regulator-framework cross-reference for the 2016 guidance, treat it as a research prompt and verify against the BIS publication of the source document before any client work product records the alignment. When an AI tool supplies a regulator strategic-phrase provenance, verify the citation against the BIS speech archive and the publications page for the cited year. When an AI tool supplies a definitional alignment with the FSB Cyber Lexicon or FSB 'Effective Practices', verify against the FSB publications page for the cited document.

When an AI tool reports on the operative status of the 2016 guidance, verify against the BIS press release stream for the deliverable period, with a specific check for any open CPMI-IOSCO consultation.

AI tools are most safely used, in this context, for outlining the structure of a deliverable on the 2016 guidance, identifying which of the guidance categories may be relevant to a particular question, and surfacing adjacent regulator publications that the team can verify directly. The risk sits in the next step: asking the AI to supply the specific cross-reference, provenance attribution, definitional alignment, or revision-status statement that would need to appear in a final deliverable. At that point, the source document and the BIS press release stream are the only reliable inputs.

How RLB Can Help

RegLeg's published Hallucination Research is available as a free pre-flight check for international cyber-programme work on the 2016 CPMI-IOSCO guidance. Before relying on AI-assisted output for regulator-framework cross-references, programme-foundation references, definitional alignments, or operative-status statements, Public Auditors can consult the research to identify where AI tools have demonstrably mis-stated the regulator record: asserted NIST CSF alignments, misattributed CPMI strategic phrases, overstated operational depth, asserted FSB Cyber Lexicon consistency, and missed revision activity. The research covers specific regulator instruments and surfaces the exact questions where AI tools have failed, making it a practical reference rather than a general caution.

For firms where multiple Public Auditors teams are working the same regulatory portfolio, RegLeg offers bespoke deep-dives into individual cyber instruments. These engagements go beyond the published findings to examine the full pattern of AI failure modes relevant to the instrument: the question types, the failure mechanisms, and the risk implications for the Public Auditors team's work. The output is designed to be shared across functions and used as a durable reference, reducing duplicated due-diligence effort and creating a consistent internal standard for AI-assisted regulatory work.

RegLeg also develops training and CPD-aligned content for Public Auditors teams working on the international cyber framework. The material translates the failure-mode catalogue into practical guidance on the classes of error practitioners should watch for: asserted regulator citations that the source does not contain, misattributed regulator strategic phrases, definitional alignments collapsed across publication gaps, and missed regulator revision activity. Separately, RegLeg offers a confidential review of a Public Auditors team's existing AI-use policy against the failure-mode catalogue, identifying gaps between the policy's assumptions and the documented evidence of how AI tools perform on the 2016 guidance in practice.

Every finding on this page compares an AI subject's account of the rule against the regulator's verbatim text from the regulator's own portal. Both are linked. Each delta, its root causes, and impact analysis are documented and published with immutable Citation IDs.