VectorCertain's MYTHOS Playbook Maps Directly to Five Eyes Agentic AI Security Guidance

VectorCertain LLC today announced the completion of manuscript preparation for The MYTHOS Playbook, a technical reference that directly maps to the Five Eyes joint guidance on agentic AI security published on May 1, 2026. The book, set for June 2026 publication, provides critical-infrastructure CISOs with operational implementation details for the five risk classes identified by the six signatory agencies: privilege, design and configuration, behavioral, structural, and accountability.

The Five Eyes guidance, co-authored by CISA, NSA, Australia's ASD ACSC, the Canadian Centre for Cyber Security, NZ NCSC, and UK NCSC, marks the first coordinated multi-government security guidance specifically addressing agentic AI systems. It opens with the observation that agentic AI systems increasingly operate across critical infrastructure and defense sectors, and closes with explicit caution that organizations should assume agentic AI systems may behave unexpectedly and prioritize resilience and risk containment over efficiency gains.

The market context the guidance enters is severe. Gartner projects AI agents will be embedded in 40% of enterprise applications by the end of 2026, up from less than 5% in 2025. One in eight enterprise breaches now involves AI agents according to Digital Applied, a 340% year-over-year increase, with 78% of compromised agents found to be over-permissioned. Analysis of 18,470 production agent configurations found 98.9% lack deny rules entirely, and the Centre for Long-Term Resilience documented 698 real-world AI deception incidents in a single six-month window.

The MYTHOS Playbook fills the gap between policy intent and CISO-grade implementation. It includes a 119-cell cross-walk matrix at Appendix C mapping every Five Eyes risk class against NIST AI RMF, OWASP LLM Top 10, OWASP Agentic Top 10, CRI FS AI RMF, and MITRE ATLAS. The book also delivers a 12-clause vendor RFP language library at Appendix G, statistical detection methodology validated across 7,000 adversarial scenarios with 100% recall and a 3-sigma lower bound of ≥99.65% at 99.7% confidence using the Clopper-Pearson exact binomial method, and hash-chained audit record samples aligned to SOX 7-year retention requirements.

Joseph P. Conroy, Founder and CEO of VectorCertain LLC, stated that the Five Eyes did the hard policy work establishing agentic AI risk as a national-security-grade concern, and the MYTHOS Playbook is the operational complement providing technical references a CISO can hand to a security architect. Importantly, the manuscript was structurally complete before the Five Eyes guidance was published, meaning the convergent risk taxonomy is independent operational validation of both documents. The Playbook's 7-vector behavioral risk taxonomy was independently derived from real-world incident analysis, including documented cases such as the 698 AI deception incidents and the 88% incident rate finding from AGAT Software.

VectorCertain's SecureAgent platform, which underpins the book's technical foundations, has logged 14,208 internal trials across 38 techniques and 3 adversary profiles with zero failures, delivering a Technical Evaluation Score of 1.9636 out of 2.0 measured against MITRE's published TES methodology. The platform achieves a false-positive rate of 1 in 160,000, approximately 53,333 times below the EDR industry average. MITRE ATT&CK Evaluations Technical Lead Lex Crumpton confirmed in direct communication that SecureAgent represents a fundamentally different threat model from post-execution detection, validating pre-execution AI governance as a new security category.

The book is structured in 7 parts with 34 chapters and 9 appendices spanning approximately 450,000 words. Pre-order interest registration is open at vectorcertain.com.