Michael Bannach
A defense contractor gets hit with ransomware on a Friday afternoon. The IT team isolates the affected servers, calls the cyber insurance broker, and assumes the policy they’ve paid for every year will absorb the damage. Then the claims adjuster asks for the multi-factor authentication configuration logs from six months before the incident. The contractor has MFA – mostly. It wasn’t enforced on two legacy accounts that hadn’t been decommissioned. That gap, unrelated to how the ransomware actually got in, becomes the basis for a reduced payout.
This is the conversation nobody has until it’s too late: cyber insurance was never designed to be a substitute for actual security controls, and CMMC was never designed to make you insurance-proof. They are two separate systems built by two separate industries, and the contractors who treat them as interchangeable are the ones who get the worst outcomes from both. Understanding how they actually relate to each other – where they reinforce one another and where they leave real gaps – is the difference between a policy that pays out and one that becomes a legal argument you lose.
Cyber Insurance Was Never a Compliance Program
Cyber insurance is a financial instrument. It exists to transfer the cost of a covered incident from your balance sheet to a carrier’s, in exchange for a premium and a set of representations about your security posture. It does not, on its own, harden a single endpoint, patch a single vulnerability, or verify that your access controls are configured the way you told the underwriter they were. A policy sitting in a folder does nothing until an incident forces someone to open it, and by then it’s too late to fix the gaps between what you attested to and what was actually running in your environment.
That distinction matters more for defense contractors than for almost any other industry, because contractors handling Controlled Unclassified Information carry contractual security obligations that exist independently of whatever insurance they carry. DFARS clause 252.204-7012 requires safeguarding of covered defense information and mandates incident reporting within a fixed window regardless of what your insurance policy says about notification timelines. An insurer paying a claim doesn’t relieve a contractor of that reporting obligation, and a lapse on the DFARS side can create exposure that no policy is written to cover. This is one of the clearest places where treating insurance as a stand-in for actual compliance work falls apart — the government doesn’t care what your policy limits are.
Why the Two Frameworks Started Asking the Same Questions
CMMC and cyber insurance underwriting didn’t converge by accident. Both industries spent years relying on self-attestation — contractors scoring themselves against NIST SP 800-171 with no independent check, and insurance applicants filling out a questionnaire that asked yes-or-no questions nobody verified. Both models produced the same failure: organizations reported controls that didn’t actually exist in practice, and the gap only surfaced after something went wrong.
The DoD’s CMMC Program replaced self-attestation with third-party assessment for most Level 2 contractors specifically because self-reported scores weren’t a reliable signal of actual risk. Insurance underwriters reached the same conclusion on their own timeline, tightening applications to request configuration exports, log samples, and evidence rather than checkbox answers. A contractor working through compliance readiness today is being asked to prove almost the same things twice, by two different audiences, using much of the same underlying evidence. That overlap is real, and it’s useful — but it is not the same thing as coverage, and conflating the two is where contractors get exposed.
What a Passed Assessment Actually Proves to an Insurer
A CMMC Level 2 certification demonstrates that an assessor reviewed your System Security Plan, tested a sample of your controls, and confirmed they were implemented the way you documented them. That’s a meaningful signal, and insurers increasingly treat it as one. Organizations that have gone through independent verification of controls like multi-factor authentication, encrypted backups, and continuous monitoring are, in practice, addressing many of the same risk factors that drive the cyber insurance claims underwriters worry about most.
But a certification is a point-in-time snapshot of a defined scope. It says nothing about the parts of your environment that sit outside CUI boundaries, nothing about your finance team’s exposure to business email compromise, and nothing about how long a production outage would cost you before a customer walked. An insurer reading your certification correctly understands it as strong evidence about a specific slice of your risk profile — not a guarantee that covers the full financial blast radius of a real incident. Contractors who lean on the certification as their entire pitch to a broker are handing over half a story and expecting full credit for it.
Where the Overlap Actually Helps You — And Where It Doesn’t
The genuinely useful overlap between CMMC and cyber insurance sits in a specific set of controls that both frameworks weight heavily, but it’s worth being precise about where the overlap stops, because that’s exactly where contractors get caught off guard.
Controls that typically satisfy both a CMMC System Security Plan and a modern insurance renewal questionnaire include enforced multi-factor authentication across privileged and remote access accounts, encrypted and independently tested backups, endpoint detection and response coverage across the environment, a documented and exercised incident response plan, and continuous monitoring with retained audit logs. Build these once, thoroughly, through services like managed IT services or cybersecurity engagements structured around CMMC scope, and you get value on both sides of the ledger.
Where the two frameworks diverge is just as consistent, and this is the list that actually protects a contractor from a bad surprise:
- Business interruption exposure — CMMC has no opinion on how long your shop floor can sit idle before it costs you a customer; a manufacturer’s cyber policy often treats this as the single largest coverage line.
- Social engineering and fraud losses — wire fraud from a convincing executive impersonation email touches money, not CUI, and sits entirely outside CMMC’s scope.
- Regulatory fines and third-party liability — a breach affecting personal data of employees or clients can trigger obligations that have nothing to do with the Controlled Unclassified Information CMMC is scoped to protect.
- Systems outside the CUI enclave — a contractor with a tightly scoped CMMC boundary can have that boundary certified while leaving unmanaged shadow IT or unscoped cloud accounts as an open door for a claims-relevant incident.
- AI-assisted attack exclusions — some newer policies carry exclusions or sub-limits when an AI tool played a meaningful role in the attack chain, a category that has nothing to do with a CMMC control set built before generative AI became a routine phishing accelerant.
A contractor who only looks at the overlap and never reads the exclusions is the one who discovers the gap during a claim instead of during a renewal conversation.
The Warranty Problem: How a Compliance Gap Becomes a Denial
Every cyber insurance policy is underwritten on the basis of representations made in the application. That application functions as a warranty, and carriers have gotten considerably more willing to use it as grounds for denial when the post-incident forensic investigation reveals a gap between what was represented and what was actually running. If a contractor told an underwriter that MFA was enforced organization-wide, and the investigation after a breach turns up two accounts where it wasn’t, the carrier has a documented basis to argue the policy was issued on a false premise — even if those two accounts had nothing to do with how the attacker got in.
This is where CMMC’s evidence discipline becomes directly useful, independent of certification status. The gap analysis, the Plan of Action and Milestones, and the System Security Plan produced during CMMC preparation are the same kind of documentation that proves an insurance application was accurate at the time it was signed. A contractor without that paper trail is relying entirely on memory and good faith to defend an application warranty months or years after the fact, which is not a position anyone wants to be in during a claims dispute. Guidance published by CISA on cybersecurity best practices consistently points back to the same theme — documented, verifiable controls are what actually hold up under scrutiny, not descriptions of controls that existed on paper but not in practice.
SPRS Scores, Assessment Evidence, and What Underwriters Actually See
Supplier Performance Risk System scores were built for DoD contract eligibility, not insurance underwriting, but the evidence behind them is increasingly relevant to both. As more carriers explicitly ask about NIST 800-171 posture or CMMC status during underwriting, a contractor’s SPRS score and certification trajectory start functioning as a proxy for insurability, not just contract eligibility. An organization with a strong, independently verified score is negotiating from a different position than one asking a broker to take a self-reported number at face value.
This is also where the C3PAO assessment process pays a second dividend. The interviews, documentation review, and control testing an assessor conducts produce exactly the kind of verified evidence trail an underwriter wants and rarely gets from a standard application. Contractors who understand what an assessment day actually involves go into both the certification and the insurance renewal better prepared, because they know precisely what evidence supports which claim. The CyberAB Marketplace is the authoritative source for locating a Registered Practitioner Organization or C3PAO if that assessment hasn’t been scoped yet.
Infrastructure That Satisfies the Assessor and the Underwriter at the Same Time
The efficient path here is building one security and documentation program that serves both audiences instead of running compliance and insurance readiness as two competing projects fighting for the same IT budget. That starts with infrastructure decisions that hold up under both kinds of scrutiny — encrypted, tested backup and disaster recovery capability that satisfies CMMC’s contingency planning requirements while also being the single factor underwriters weight most heavily when pricing ransomware coverage; cloud transformation work that consolidates sprawl into a scoped, monitored environment instead of leaving shadow IT as an unaccounted-for liability; and AI integration handled deliberately enough that tools like Copilot or ChatGPT don’t become an unmonitored path for CUI to leave the environment, since that’s a gap both a CMMC assessor and an insurance underwriter will eventually ask about.
Communication infrastructure matters here too, more than most contractors expect. A cloud-based VoIP system with proper access controls closes off a vector that social engineering campaigns increasingly exploit, and it’s the kind of control that shows up favorably on an insurance questionnaire without ever appearing in a CMMC control set. None of this is about chasing certification for its own sake — it’s about building infrastructure that happens to satisfy two different audiences because the underlying security posture is genuinely sound.
Where a vCIO Fits Into the Insurance Conversation
Most small and mid-sized contractors don’t have the internal bandwidth to run CMMC preparation, insurance renewal, and day-to-day operations as three coordinated efforts at once. This is precisely the gap a vCIO is built to close — someone who can sit between the technical team, the compliance advisor, and the insurance broker, translating security posture into terms all three actually recognize. A vCIO reviewing a renewal application against a current System Security Plan catches the exact kind of misalignment that turns into a denied claim later: representations that were true at the last renewal but haven’t been re-verified since, or coverage gaps around business interruption and social engineering that nobody flagged because the compliance team and the insurance broker never compared notes.
This coordination matters differently depending on the sector. Engineering and manufacturing firms juggling both defense work and commercial contracts carry business interruption exposure that dwarfs anything in a CMMC control set, since a shop floor sitting idle for a week costs real money regardless of whether CUI was ever touched. Organizations in finance, healthcare, and legal sectors carrying defense contracts alongside their primary industry obligations often discover their insurance needs are shaped as much by those other regulatory frameworks as by CMMC scope. A co-managed IT arrangement gives contractors with an existing internal IT team the additional bandwidth to run this coordination without displacing staff who are already stretched thin.
When a Claim and an Assessment Overlap: Incident Response Under Two Kinds of Scrutiny
An incident response plan built to satisfy CMMC’s IR.L2 requirement and an incident response process that holds up during an insurance claim are closer to the same document than most contractors realize, but they get read by two very different audiences with two very different motivations. A C3PAO assessor wants evidence the plan was tested and would actually function during a real event. A claims adjuster wants evidence the response followed the notification timelines and containment steps the policy requires, and wants it documented in a way that supports the narrative that the incident was handled competently rather than negligently.
A policy document that was never exercised fails both tests simultaneously. When an actual incident hits, the gap between a written IR plan and a functioning one becomes visible immediately — to the assessor during the next assessment cycle, and to the adjuster within days of the claim being filed. Contractors who treat incident response as a tabletop exercise run once a year, rather than a living process integrated into daily operations, are the ones who find both processes working against them at the worst possible moment. This is also where DFARS reporting obligations intersect directly with claims handling — a delayed or incomplete report to the DoD can complicate a claim even when the carrier’s own notification requirements were technically met.
Conclusion
CMMC and cyber insurance were never designed to be substitutes for each other, and the contractors who get burned are almost always the ones who assumed one covered what the other was actually responsible for. A certification proves your controls held up to independent scrutiny within a defined scope. A policy transfers financial risk for the events that scope doesn’t cover, and only pays out cleanly when what you told the underwriter matches what was actually running in your environment. Built together, deliberately, with infrastructure and documentation that serve both purposes at once, they close real gaps. Treated as interchangeable, they leave exactly the kind of hole that surfaces during a breach investigation or a claims dispute — which is the worst possible time to find out.
If your organization is planning its CMMC compliance journey, contact Stealth Technology Group today at (617) 903-5559 or visit the website to learn how modern cybersecurity infrastructure can accelerate your path toward certification readiness.
