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Rover Production and IT systems disru... ](https://www.bbc.co.uk/news/articles/cx2gx8p3rzeo)[2026 Peter Green Chilled Order and logistics data ](https://www.bbc.co.uk/news/articles/c0k7yy8n3g5o)[2026 Adidas UK Customer contact details ](https://www.bbc.co.uk/news/articles/c78jkev1el2o)[2026 PowerSchool 62.4M records ](https://www.bleepingcomputer.com)[2026 DISA Global Solutions 3.3M records ](https://techcrunch.com)[2026 Globe Life 850K records ](https://www.securityweek.com)[2026 Lidl GB Customer contact data ](https://www.theguardian.com/business/2026/jun/11/lidl-gb-third-party-data-breach)[2026 Asahi Group Production systems disrupted ](https://www.reuters.com/technology/cybersecurity/asahi-says-cyberattack-disrupted-operations-japan-2025-09-29/)[2026 Kido International 8K records ](https://www.bbc.co.uk/news/articles/c623d7v0e5xo)[2026 Collins Aerospace (RTX) Check-in and boarding disruptio... ](https://www.bbc.co.uk/news/articles/c789e7l1z7po)[2026 Jaguar Land Rover Production and IT systems disru... ](https://www.bbc.co.uk/news/articles/cx2gx8p3rzeo)[2026 Peter Green Chilled Order and logistics data ](https://www.bbc.co.uk/news/articles/c0k7yy8n3g5o)[2026 Adidas UK Customer contact details ](https://www.bbc.co.uk/news/articles/c78jkev1el2o) [View All →](/learn/breaches) [![Firevault - offline secure storage, physically disconnected from the internet](/assets/logo-color-DBVl0KCg.png)](/) Products Solutions [Why OSS](/why-oss) More [Help](/help)[Get started](/get-started) Overview Who this guide is forWhat finance is actually respons…The decisions you own, and what …How to size the exposureCyber insurance, read properlyThe questions to askThe evidence to expectWhat happens when preventative c…Deciding what you actually needThe Control Blueprints most rele…Where to go nextSources and further readingAbout this guideMore [Guides](/learn/knowledge?filter=guides) Guides · 28 August 2026 # The CFO's Guide to Cyber Risk, Financial Resilience and Recovery How finance leaders should quantify cyber exposure, test what insurance really transfers, and judge whether recovery investment is proportionate to the loss it prevents. ![Mark Fermor](/assets/mark-fermor-aWtKNSv7.jpg) Mark Fermor Director & Co-Founder, Firevault 6 min read Share 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![The CFO's Guide to Cyber Risk, Financial Resilience and Recovery](https://zomvctmqpgirvjnvawlz.supabase.co/storage/v1/object/public/article-images/guides%2Fcfo-guide-cyber-risk-financial-resilience.jpg) Guides Why it matters ## What this means for organisations holding critical data How finance leaders should quantify cyber exposure, test what insurance really transfers, and judge whether recovery investment is proportionate to the loss it prevents. **On this page**[Who this guide is for](#section-0)[What finance is actually respons…](#section-1)[The decisions you own, and what …](#section-2)[How to size the exposure](#section-3)[Cyber insurance, read properly](#section-4)[The questions to ask](#section-5)[The evidence to expect](#section-6)[What happens when preventative c…](#section-7)[Deciding what you actually need](#section-8)[The Control Blueprints most rele…](#section-9)[Where to go next](#section-10)[Sources and further reading](#section-11)[About this guide](#section-12) On this page 1. [Who this guide is for](#section-0) 2. [What finance is actually responsible for](#section-1) 3. [The decisions you own, and what you can delegate](#section-2) 4. [How to size the exposure](#section-3) 5. [Cyber insurance, read properly](#section-4) 6. [The questions to ask](#section-5) 7. [The evidence to expect](#section-6) 8. [What happens when preventative controls fail](#section-7) 9. [Deciding what you actually need](#section-8) 10. [The Control Blueprints most relevant to this role](#section-9) 11. [Where to go next](#section-10) 12. [Sources and further reading](#section-11) 13. [About this guide](#section-12) ## Who this guide is for This guide is written for chief financial officers, finance directors and audit committee members who are asked to fund cyber security without a reliable way to price the risk it removes. ## What finance is actually responsible for - Quantifying exposure: business interruption, recovery cost, regulatory cost and claim outcomes. - Deciding how much risk is transferred through insurance and how much is retained. - Protecting liquidity through a period when invoicing, payroll and collections may be degraded. - Ensuring financial controls survive an incident, including payment authorisation and supplier verification. - Reporting cyber risk truthfully in the annual report and to lenders and insurers. ## The decisions you own, and what you can delegate - **Own** the loss model, the insurance structure, the retained risk and the capital allocation. - **Own** the working-capital plan for an outage of several weeks. - **Delegate** control selection and architecture to the CIO, CISO and IT leadership. - **Delegate** technical testing, but require the recovery times used in your model to be evidenced. ## How to size the exposure Most cyber business cases fail because they price the control rather than the loss. Build the loss first. 1. Identify the revenue-bearing processes and the daily contribution each one carries. 2. Take the recovery time the business would actually achieve, not the target in the policy document. 3. Add the recovery cost: incident response, legal, forensics, overtime, temporary manual process, customer credits. 4. Add the regulatory and contractual cost, including notification, remediation and service credits. 5. Subtract only what the insurance policy will genuinely pay, after the waiting period and sub-limits. The residual figure is the number that justifies, or fails to justify, spend. Investment is proportionate when it materially shortens recovery time for the processes that carry the largest daily loss. ## Cyber insurance, read properly - The waiting period often removes the first day or two of business interruption cover entirely. - Cover for systems the insured does not own, including cloud providers, is frequently sub-limited. - Warranties about backups, multi-factor authentication and patching can affect a claim if they are not met. - Ransom payment cover is narrowing, and sanctions rules may prohibit payment regardless of cover. - Insurers increasingly price physical isolation and tested offline recovery favourably. Ask your broker directly. ## The questions to ask 1. What is our modelled loss per day for each critical process, and who agreed it? 2. What recovery time can we evidence, as distinct from the one we have planned for? 3. What exactly would our policy pay in the scenario we are most worried about? 4. Can we run payroll and pay critical suppliers if our finance systems are unavailable for two weeks? 5. Which financial controls depend on systems an attacker would hold? ## The evidence to expect - A dated restore test with measured durations for the finance stack. - A written business interruption model agreed between finance and IT. - A policy review noting waiting periods, sub-limits and warranties. - A manual payment and verification process that does not depend on email. - A supplier concentration list with financial exposure attached. ## What happens when preventative controls fail Prevention buys time. It does not remove the need to answer a simple question: if an attacker holds your identity platform and your management console tonight, what still works tomorrow morning? Most organisations discover that their backup catalogue, their recovery credentials and their runbooks all depend on the systems that have just been taken. That is the dependency worth removing first. No control removes the possibility of a serious incident. The realistic goal is a smaller blast radius, a recovery path that does not depend on the compromised estate, and evidence that both were tested. ## Deciding what you actually need Finance should judge this as risk reduction per pound, not as engineering. The relevant question is which option shortens recovery for the processes carrying the highest daily loss. Firevault is the company. It provides three distinct things, and the honest answer is often that you need one of them rather than all of them. - **[Offline Secure Storage®](/offline-secure-storage)** holds a defined set of critical records and clean recovery data physically disconnected from the live estate. It is a protected set, not a replacement for your backup infrastructure. - **[Control Modules](/control)** are a suite of nine purpose-built tools and techniques that give you physical control over the paths into and across your estate. Introduce only the modules that map to the risk you are treating. - **[Control Blueprints](/control-blueprints)** are proven combinations of those modules assembled for a named outcome, such as containing a live breach or governing third-party access. If your existing controls already deliver a tested recovery path that survives the compromise of your identity and management planes, and you can evidence it, you may not need any of this. Test that assumption before you buy anything. If you are unsure which of the three applies, the [Firevault Concierge](/find-my-oss) walks through the question set without a sales conversation. ## The Control Blueprints most relevant to this role These are the patterns most often justified on financial grounds. Control by Firevault is a set of nine Control Modules, grouped into the FIRE layer (Firebreak, Isolate, Relay, Execute) and the VAULT layer (Validate, Archive, Unlink, Lock, Transfer). Seven Control Blueprints combine those modules for a specific outcome. You do not need all nine modules, and most organisations start with one blueprint. - **[CP-01 Stop Kill-Chain Ransomware](/control-blueprints/cp-01)** uses Firebreak, Isolate, Execute. Read the [stop kill-chain ransomware guide](/learn/guides/stopping-kill-chain-ransomware-control-blueprint). - **[CP-02 Contain Active Breaches](/control-blueprints/cp-02)** uses Firebreak, Isolate, Execute. Read the [contain active breaches guide](/learn/guides/containing-active-breaches-control-blueprint). - **[CP-03 Control Third-Party Access](/control-blueprints/cp-03)** uses Validate, Relay, Lock. Read the [control third-party access guide](/learn/guides/controlling-third-party-access-control-blueprint). - **[CP-06 Prove Compliance Through Control](/control-blueprints/cp-06)** uses Validate, Lock, Archive. Read the [prove compliance through control guide](/learn/guides/proving-compliance-through-control-blueprint). The full set is on the [Control overview](/control) and the [Control Blueprints index](/control-blueprints). ## Where to go next For the governance view, read [cyber security for boards](/learn/guides/cyber-security-for-boards). For the recovery mechanics behind your assumptions, read the [IT director guide to ransomware recovery](/learn/guides/it-director-guide-ransomware-recovery). Our [note on cyber insurance and physical controls](/learn/guides/cyber-insurance-physical-controls) covers the underwriting conversation. ## Sources and further reading - [NCSC, Mitigating malware and ransomware attacks](https://www.ncsc.gov.uk/guidance/mitigating-malware-and-ransomware-attacks) - [ICO guidance for organisations](https://ico.org.uk/for-organisations/) - [FRC UK Corporate Governance Code](https://www.frc.org.uk/library/standards-and-codes/uk-corporate-governance-code/) - [NIST SP 800-34, Contingency Planning Guide](https://csrc.nist.gov/pubs/sp/800/34/r1/final) - [NIS2 and the UK equivalent regime explained](/solutions/oss/compliance/nis2) ## About this guide **Author** Mark Fermor, Firevault. **Reviewed by** Firevault advisory board. **Last reviewed** 28 August 2026. This guide draws on primary regulatory and technical sources together with Firevault's own field work on physical isolation and offline recovery. It is guidance, not legal advice. Where a legal or regulatory duty is in question, take advice on your own circumstances. Other guides in this series are listed on the [role guide hub](/learn/guides/by-role). About the author ![Mark Fermor](/assets/mark-fermor-aWtKNSv7.jpg) ### Mark Fermor [](https://www.linkedin.com/in/mfermor) Director & Co-Founder Co-founder of Firevault, focused on offline secure storage and protecting individuals and businesses from fraud, fines, loss and damage. Speaker, owner and advisor. The Firevault view**Offline Secure Storage® keeps a clean copy beyond the reach of an attacker.**[Why #OSS →](/why-oss) Control systems and access**Cut the physical paths attackers and third parties depend on.**[Explore Control →](/solutions/control) Get started**Get started, or talk to a member of the team.**[Get started →](/get-started) How Firevault would handle this ## A recovery copy an attacker cannot reach Offline Secure Storage® keeps a clean copy of your data on hardware that is physically disconnected, so backup and recovery do not depend on systems an intruder can touch. [Get started](/get-started)[Talk to the team](/demo) **Hardware**Your copy sits on dedicated encrypted hardware **Disconnect**Offline by default, connected only when you say so **Recovery**A known-clean copy to rebuild from, on your timetable **Location**Held in a secure Firevault Bunker ## Continue learning - [ ### Security Architecture Guide: Physical Isolation, Segmentation and Cyber Resilience The deepest guide in the series: trust boundaries, attack paths, failure domains, Layer 1 isolation versus logical segmentation, control and management planes, Zero Trust, the Purdue Model and IEC 62443. Read guide ](/learn/guides/security-architecture-guide) - [ ### Cyber Risk & Compliance Guide: Controls, Evidence and Resilience for GRC Leaders How risk and compliance leaders can move from control existence to control effectiveness: risk treatment, evidence, third-party assurance, exceptions and remediation that survive audit. Read guide ](/learn/guides/cyber-risk-and-compliance-guide) - [ ### IT Director's Guide to Ransomware Recovery, Backups and Infrastructure Resilience The practical recovery guide: immutable versus offline, Active Directory rebuild, management plane compromise, clean recovery environments, restore testing and realistic RTO and RPO. Read guide ](/learn/guides/it-director-guide-ransomware-recovery) - [ ### CISO Guide to Cyber Resilience: Risk, Recovery and Physical Control Threat modelling, attack paths, blast radius and recovery from the CISO seat, and an honest read of where Offline Secure Storage, Control Modules and Control Blueprints do and do not help. Read guide ](/learn/guides/ciso-guide-cyber-resilience) Related Reading ## You may also find these useful [ ![Protecting Students, Peers and Partners: A Practical Education Data Briefing](/__l5e/assets-v1/6ecf6bfc-3d28-40a7-8a6a-2d42fe36a21a/safeguarding-education-data-2026-v2-2x.jpg) Guides ### Protecting Students, Peers and Partners: A Practical Education Data Briefing A practical, forward-looking briefing to help schools, colleges and universities protect students, staff and partner data after the Department for Education breach. 29 Jul 2026 13 min ](/news/guide-safeguarding-education-data)[ ![Urgent Briefing and Advice: Protecting Personal Data for High-Profile Figures in the Public Eye](/__l5e/assets-v1/084c38b8-253b-4cc2-9056-c78a2fbd36c3/urgent-warning-triangle-20260714-2x.jpg) Guides ### Urgent Briefing and Advice: Protecting Personal Data for High-Profile Figures in the Public Eye Practical steps for serving and former politicians, councillors, campaigners, journalists, executives, broadcasters and anyone in the public eye, covering email security, device hygiene, threat handling and offline secure storage. 14 Jul 2026 22 min ](/news/urgent-guide-protecting-personal-data-high-profile-public-eye)[ ![500,000 Volunteers Breached Through Authorised Access: A Controlled Access Buyer's Guide](https://zomvctmqpgirvjnvawlz.supabase.co/storage/v1/object/public/article-images/news%2Fcontrolled-access-buyers-guide.jpg) Guides ### 500,000 Volunteers Breached Through Authorised Access: A Controlled Access Buyer's Guide In April 2026, approved researchers exfiltrated the health records, genetic data, and medical histories of 500,000 UK Biobank volunteers through authorised access channels, then listed the data for sale on Alibaba. The breach was not caused by a hack. It was caused by a model that assumes licence agreements can prevent data theft. This guide covers why that model fails and what physical controls replace it. 23 Apr 2026 18 min ](/news/controlled-access-buyers-guide-offline-secure-storage) ![Mark Fermor](/assets/mark-fermor-aWtKNSv7.jpg) ![David Bailey](/assets/david-bailey-Dgqj8eaE.jpg) ![Kenny Phipps](/assets/kenny-phipps-CVyooRsR.jpg) Online Now Concierge ## Put this guide into practice Ready to apply what you have learned? Explore how Firevault delivers the offline protection covered in this guide. Takes about 2 minutes. No account needed. Find Out Free 2 mins No sign-up