Maritime Cyber Risk 2026: The DNV False Sense of Security Paradox, Four Operational Gaps, and Charter Approval Implications

Maritime has spent the past five years moving cyber risk from "IT department concern" to "ship safety concern". The DNV Maritime Cyber Priority 2024/25 report, the second edition of DNV's biennial cyber survey across roughly 500 maritime professionals, is the most candid industry self-assessment to date. It is also the one that should worry shipowners most, because the headline finding is not that cyber attacks are increasing — that is uncontroversial. The headline finding is that confidence in cyber posture and actual exposure are moving in opposite directions. This brief examines what the data actually says, what captains see on ship systems that explains the gap, what the four operational categories of vulnerability look like in concrete terms, and why cyber posture is becoming a commercial differentiator for charter approval and S&P decisions through 2026-2028.

The Headline Paradox: 83 Per Cent Confident, 31 Per Cent Attacked

DNV's survey of close to 500 maritime professionals produced a data set that is unusual in its internal contradiction. On the positive side of the ledger, 83 per cent of respondents report a good security posture, 71 per cent are confident their organisation can rapidly recover from a cyber-attack, and 73 per cent are increasing cyber spending year-over-year. These are the numbers an industry tells itself when it believes it is managing risk well.

On the exposure side, the same survey records that 31 per cent of respondents experienced at least one cyber-attack in the 12 months leading up to October 2024. The comparison point matters: in DNV's 2023 survey covering the previous five years, the equivalent figure was 17 per cent. The annualised attack rate has effectively risen by roughly a factor of nine. Maritime professionals are not unaware of this — 71 per cent believe their industrial assets are more exposed to cyber-attack than ever before. They simultaneously feel prepared and know they are more exposed. This is what DNV explicitly labels a "false sense of security", locating it in three specific areas: supply chains, operational technology (OT), and training and skills.

The expert framing from Svante Einarsson, Head of Maritime Cybersecurity at DNV Cyber, captures the operational tension: "Organizations may feel prepared as more resources deploy, but reality proves more complex". Spending more does not necessarily close the gap between perceived and actual posture — particularly when the spending lands in IT-style controls while the exposure increasingly sits in OT (operational technology) and supply chain interdependency.

Why Maritime Tolerates More Cyber Risk Than Energy, Manufacturing, or Healthcare

The most counterintuitive finding in DNV's 2024/25 report is comparative. 61 per cent of maritime professionals believe the industry should accept higher cyber risk if it enables innovation and new technologies — a level of risk appetite that exceeds the equivalent appetite measured in energy, manufacturing, and healthcare in DNV's parallel cyber surveys. This is unusual because maritime is, formally, critical infrastructure under most jurisdictional frameworks. Critical infrastructure industries are generally expected to be more conservative on cyber risk, not less.

The cultural explanation visible from a captain's operational perspective is consistent across the global fleet. Maritime carries a strong safety culture rooted in ISM Code, BMP5 best practices, SOLAS compliance, and decades of class society inspection regimes — the safety culture is genuinely deep. The technological culture is comparatively casual. ECDIS chart database updates are routinely skipped or deferred to next port; satellite communications terminals run unpatched firmware because patching requires vendor coordination; propulsion control systems run on software versions stable since 2015 because "if it works, do not touch it" is operationally rational; default passwords on bridge integration consoles are documented in maintenance manuals and rarely changed. These are not exceptional conditions — they are the normal operating state of a substantial portion of the world fleet.

From a commercial perspective, maritime's higher cyber risk tolerance translates into structural exposure that the industry's confidence does not match. Innovation programmes — autonomous shipping pilots, alt-fuel engine integration, AI-assisted navigation, predictive maintenance platforms, digital twins — expand attack surface without proportionate cyber maturity build-out. This is exactly what DNV's data captures: spending is increasing, confidence is high, exposure is rising faster.

The Four Operational Gaps — and What Captains Actually See

DNV identifies four categories of operational gap. Each maps directly to specific ship-system conditions that an experienced captain or chief engineer recognises without prompting.

Gap 1: OT security resources at system design

The first gap is the scarcity of experienced OT (operational technology) security resources at the point of system design and installation. Concrete examples a captain recognises:

• ECDIS installation: bridge electronic chart systems (Furuno, Transas, Sperry, Wärtsilä) are installed by vendor technicians focused on chart accuracy and operational readiness. Default passwords typically remain; network segmentation between ECDIS and other bridge systems is often absent; USB ports on the bridge console are not disabled.
• Engine room automation: Kongsberg K-Chief, Wärtsilä NACOS, ABB AC-800M — integrators optimise throughput and reliability, not network defence. Penetration testing is rarely done; typical installation equals a known configuration with documented public vulnerabilities.
• Cargo handling computers: bulker loadicators and tanker custody transfer systems are designed for cargo accuracy. Network isolation from the rest of ship systems is typically afterthought, not design principle.
• VDR (Voyage Data Recorder): firmware updates arrive on vendor USB sticks without cryptographic integrity verification. Service technicians plug USB during port stops; the plug-and-play model is the threat vector.
• Crew Wi-Fi and navigation backbone: on many vessels the crew Wi-Fi shares physical switching infrastructure with operational systems, with weak or absent VLAN segmentation. A crew member's compromised personal device can become a bridge to navigation systems.

Gap 2: Detection and response for marine OT

The second gap is the absence of marine-OT-specific detection and response capability. What this means in practice:

• The captain cannot physically tell if ECDIS is compromised. There is no SIEM (Security Information and Event Management) on most bridges; no intrusion detection system; no anomaly correlation. Strange behaviour in the chart display is interpreted as glitch or version issue, not as potential attack.
• Engine room SCADA logs are not centralised across systems. An incident becomes visible only when propulsion fails. Weeks of anomalous events can pass unnoticed before kinetic consequence.
• The Designated Person Ashore (DPA) is required by ISM Code, but most DPAs are safety- and technical-trained, not cyber-trained. A master's call reporting "something strange in navigation" goes to a person without the skillset to triage.
• AIS spoofing and jamming events in the Strait of Hormuz, Persian Gulf, and Black Sea are not reported because crew do not know what counts as a cyber incident. The event becomes "GPS glitch" in the master's log.
• Cyber incident response plans exist on paper because ISM requires them. They are rarely drilled. Real events therefore find an unprepared shore office that has never executed the plan under time pressure.

Gap 3: Onboard versus onshore OT responsibility

The third gap is structural: the unclear allocation of cyber responsibility between onboard and onshore organisations. The classic operational grey zones:

• ECDIS chart database updates: USB arrives from port agent. Who scanned it for malware? Master? Office IT? Class society? Manufacturer? In standard practice — no one. This is considered routine maintenance, not a cyber decision.
• Ship machinery network ownership: who is the cyber owner — chief engineer, master, technical superintendent, IT manager, class society, equipment vendor? In most companies there is no clear answer. The grey zone produces no action.
• Vendor remote access: Wärtsilä Smart Pulse connects remotely to engine performance monitoring. The master does not know when this happens, does not approve it, has no log. The remote access is a backdoor by design — but trust is implicit.
• Crew change brings new equipment: joining officers and ratings bring laptops, USB sticks, personal phones. Onshore IT pre-checked any of this? The master must trust what he has not seen.
• Cyber incident at sea: the response chain is master → DPA → technical superintendent → IT manager → vendor support. Five hops to anyone with the necessary skillset. A time-critical incident is lost in transit.

Gap 4: Supply chain interdependencies

The fourth gap is supply chain. This is the area most owners under-track because the parties are formally external to the ship. In operational reality the parties are directly embedded in ship system function:

• Class society remote inspection tools: DNV, BV, ABS, LR use apps that connect to ship systems during remote surveys. Class society compromise becomes a bulk attack vector across the entire fleet they cover.
• Port community systems: Piraeus PCS, Rotterdam Portbase, Singapore PortNet, Hamburg DAKOSY, Antwerp NxtPort — these handle electronic clearance, bunker delivery notes (BDN), and manifests. Compromise exposes cargo, voyage, and identity data simultaneously.
• Equipment manufacturer remote diagnostics: Wärtsilä Smart Pulse, MAN ServLink, ABB Marine ASP, Kongsberg KognifAI. Each is effectively a built-in backdoor with vendor-side trust; the manufacturer's network becomes part of the attack surface.
• Charterer voyage management software: Veson IMOS, DataLoy DA-Desk, Q88, ShipNet — vessels submit daily reports including position, speed, consumption, and ETA. Charter management compromise leaks the entire fixture pipeline, voyage estimates, and competitive intelligence.
• Bunker fuel testing laboratories: VPS, Bureau Veritas Bunker Quality, Intertek — sample collection and electronic report submission. Compromised reports become fuel quality fraud, triggering charter party disputes and emissions reporting risk.
• Vetting inspectors: SIRE 2.0 OCIMF (tankers), RightShip (dry bulk), CDI (chemical) — inspectors use tablets that connect to ship Wi-Fi during inspection. Inspector device compromise becomes inspection report manipulation plus crew details exposure.
• P&I clubs: Britannia, Steamship Mutual, North P&I, Gard, Skuld — collect IoT data, claims data, voyage history. Insurance compromise reveals exposure patterns to attackers planning targeted operations.
• Crewing agency LMS: training records, certificates, medicals, passport copies — third-party SaaS platforms hold all personal data of crew. A single crewing agency compromise can expose the identity of an entire crew roster.

The shared structural feature of the four gaps is that suppliers and external parties are not in fact "third parties". They are direct components of ship operational fabric. They do not carry ship safety culture, they have no ISM responsibility, they are not accountable to owner under the same regime that binds the master and chief engineer. Capacity for harm is high; formal accountability is low. This is the structural asymmetry DNV's survey captures from the office side, and that captains see daily from the ship side.

Ransomware: The Year-Over-Year Jump That Stands Out

The single largest year-on-year movement in DNV's 2024/25 data is ransomware concern: 79 per cent of respondents are concerned about ransomware in 2024, up from 56 per cent in 2023 — a 23 percentage point jump in a single year. Three structural factors drive the escalation.

First, the sophistication of criminal gangs has risen materially. Cyber crime syndicates explicitly target industrial OT systems for higher leverage payouts. Maritime is recognised as a vertical where operational downtime carries direct revenue cost (tanker spot rates currently exceed $153,000 per day for top-tier fleet — see our 12 June brief), creating ransom valuation logic that favours hitting ships.

Second, the Maersk NotPetya 2017 precedent remains the maritime industry reference case for cost shock. NotPetya — a worm-based attack believed state-sponsored — propagated through Maersk's global IT systems in summer 2017, taking down container terminal operations across multiple continents for approximately ten days. Maersk publicly reported total damages at approximately $300 million. The incident reset boardroom understanding of maritime cyber exposure. Every CIO and CISO in shipping today is partly defined by being post-Maersk.

Third, OT systems make recovery harder than IT. Restoring an office network is days. Restoring ECDIS, engine automation, cargo handling computers, and ballast control on a vessel can require days at anchor with onboard technicians, sometimes drydock. Ransomware exploits exactly this asymmetry — maritime OT systems are higher-value targets because operational restoration is slower and more expensive than office IT. The ransom valuation logic favours attackers.

Regulatory Layer Materializing

Three regulatory developments are pulling maritime cyber from voluntary into mandatory.

Commercial Implications — Cyber as Charter Approval Factor

The most important consequence of DNV's findings is that cyber posture is migrating from regulatory checkbox into commercial differentiation. Three layers are visible.

Vetting inspectors. SIRE 2.0 OCIMF for tankers, RightShip for dry bulk, CDI for chemical tankers — each is incorporating cyber-readiness components into the inspection regime. The weighting is currently moderate, but the direction is clear. A vessel that scores well on cyber-readiness in SIRE 2.0 has measurable additional acceptance probability with oil major chartering desks.

Charterer due diligence. Major charterers (oil majors, large mining houses, container alliances, chemical specialty cargo shippers) maintain approved-vendor lists. Cyber programme maturity is increasingly one of the criteria. For sensitive cargo flows (PG-origin VLCC, refined products to highly regulated EU ports, chemical specialty cargo) cyber readiness is becoming a material gate.

Insurance markets. P&I clubs and war risk underwriters now price cyber exposure into premiums explicitly. The LMA cyber endorsements (LMA5402 and successors) clarify cover boundaries — making it easier for insurers to differentiate between cyber-mature and cyber-fragile fleet. Owners with documented cyber posture (NIST CSF, IEC 62443 for OT, ISO 27001 mapped to maritime context) receive measurably better insurance terms.

For owners with documented cyber maturity, the premium spread that already favours modern eco-compliant tonnage (see our 12 June brief on Iran War 2026 and VLCC asset bifurcation brief) is being widened by an additional cyber-mature layer. The compliant vs non-compliant fleet asset value bifurcation thesis is structurally reinforced.

What Owners, Charterers, and Brokers Should Do

The Counter-Signal — Sample Limitations and Shadow Fleet Reality

DNV's roughly 500-respondent sample is thin for an industry of approximately 2 million seafarers plus 80,000 shipowners and managers globally. The sample is also likely skewed toward DNV's natural client base — Norwegian, German, Greek, UK, Japanese, Korean, and US-listed compliant tier owners and managers. Asian crewing reality, Russian-affiliated tonnage operational practice, and shadow fleet cyber posture are likely under-represented or absent.

The directional implication is that the actual industry-wide cyber posture is plausibly worse than DNV's 31 per cent attack rate suggests. Shadow fleet vessels — by definition operating outside mainstream insurance, classification, and regulatory oversight — also operate outside mainstream cyber maturity programmes. The 1,836 vessels under global sanctions identified by Clarksons Research (see 12 June brief) constitute a fleet with vanishingly small cyber programme investment. As OFAC's case-by-case shadow fleet exit pathway opens (the GMS license precedent), some of this tonnage will return to commercial trading — bringing accumulated cyber debt into mainstream operating environments.

The bigger sample bias is on the cost side. DNV respondents are organisations that can answer a survey — they have functioning communications, organised cyber teams, recognisable security programmes. Smaller owners (single-vessel operators, sub-managers, family-owned dry bulk operators across the Med and Black Sea zones, regional crewing agencies) typically lack the structural capacity to participate in DNV's survey. They also lack the structural capacity to implement the cyber posture DNV recommends. The 9x attack rate acceleration may understate what is happening at the operational reality of the smaller-fleet, regional-operator segment.

The Bottom Line

Cyber risk in maritime is no longer an IT department concern. It is a ship safety concern, a charter approval factor, an insurance pricing input, an S&P due-diligence layer, and a vessel value differentiator. DNV's 2024/25 paradox — 83 per cent confidence sitting alongside a 9x acceleration in attack rate — is the industry self-assessment that confirms the structural shift. Cyber posture has crossed from voluntary into mandatory through the IACS UR E26/E27 newbuild framework, IMO MSC-FAL guidelines mature under ISM Code, and US Coast Guard Cyber Command attention. The commercial layer is moving in parallel through SIRE 2.0, RightShip, CDI, oil major approved-vendor lists, and P&I plus war risk insurance pricing.

The four operational gaps DNV identifies are operationally familiar to every captain and chief engineer in active service. They are not abstract risk categories; they are the actual conditions of ECDIS installations, engine room automation, vendor remote access, port community system integration, vetting inspector tablets, crewing agency platforms, and class society remote tools. The remediation roadmap is therefore practical: cyber posture audit using NIST CSF or IEC 62443, supply chain vendor risk assessment, written cyber roles assignment between ship and office, quarterly drill discipline, and IACS UR E26/E27 evidence in class survey cycles.

For owners with the maturity to implement, this is a competitive opportunity. The compliant-versus-non-compliant fleet asset value bifurcation already operating under H31 (Iran War 2026 chokepoint convergence) and the modern eco-fleet premium spread is being widened by a cyber-mature layer. For brokers and charterers, cyber posture is the new line item in due diligence — alongside age, eco-rating, flag, technical manager, and crew nationality. The 2024/25 DNV data is the corroboration that the structural shift is operating, not predicted.