Cybersecurity is no longer just an "IT" topic. It is a financial, regulatory and operational issue. In 2025, cyber incidents remain the #1 global risk for businesses, ahead of business interruption and macroeconomic risks. This ranking is not an isolated perception: it results from thousands of responses from companies and insurers worldwide.

In the EU, the threat landscape has further intensified: attacks against availability (outages, DDoS, sabotage) lead the way, followed by ransomware and attacks on data.

On the damage side, the average cost of a data breach reached $4.88M in 2024 (the largest increase since the pandemic), and the trend continues.

Meanwhile, email frauds (BEC / supplier impersonation, "CEO fraud") are exploding: $2.8B in losses reported in the United States in 2024 alone, with amounts often in the six figures per incident.

And even though more and more organizations refuse to pay a ransom (payment rate down to ~25% by late 2024), ransomware activity remains very high, with a median payment of around $110k over the same period for those who still pay.



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What the 2025 situation changes for you

  • Direct economic pressure: investigation, restoration, production/sales interruption and customer assistance costs. Average cost of a breach: $4.88M (all sectors, worldwide).

  • Digital supply chain: third-party and cloud risk weighs heavily on incidents and amplifies operational impact.

  • Compliance: GDPR (data), NIS2 (essential/important sectors), DORA (finance), ISO 27001 or CaRE (France) - beyond obligations, these frameworks genuinely reduce exposure when properly applied.

  • Attention warfare: more credible phishing (generative AI), automated intrusions, and "breach blindness": frequency normalizes risk while detection times remain long.


4 concrete examples of incidents and financial impact

These are realistic orders of magnitude meant to inform a decision. Amounts vary by sector, size, downtime, insurance, crisis communications and compliance.

1) Industrial SMB - Ransomware with 3-day production halt

  • Business interruption loss: €90k (€30k/day)

  • IR/forensics & remediation: €55k

  • Restoration & reintegration: €35k

  • OT & overtime: €15k

  • Customer assistance & late penalties: €25k

  • Indicative total: €220-260k

  • Note: even without paying a ransom (payment rate ~25% by late 2024), the operational bill remains significant.

2) BEC / wire-transfer fraud - multi-site mid-market company

  • Fraudulent wire transfer: €150-300k typical (six figures common)

  • Banking & legal fees: €10-20k

  • Process hardening (dual approval, DMARC, training): €8-15k

  • Indicative total: €170-335k

  • Reference: aggregate BEC losses of $2.8B in 2024 reported by the FBI; the 2025 DBIR confirms the prevalence of email compromises.

3) HR data breach - 40,000 records

  • Average global cost of a breach: $4.88M

  • Post-incident (hotline, monitoring, communications): +10-20% of cost

  • GDPR fines: variable depending on severity/negligence

  • Indicative total: €3-6M (depending on country, insurance, cooperation)

  • Reference: IBM Cost of a Data Breach 2024.

4) E-commerce - DDoS and 6-hour outage during peak

  • Revenue loss: hourly revenue x 6

  • Technical costs (scrubbing/mitigation): €5-15k

  • Customer service & goodwill gestures: €5-20k

  • Indicative total: highly sensitive to hourly revenue

  • Reference: in Europe, attacks on availability are at the top.


Why measure before investing

  1. Put numbers on risk (score + low/high scenarios).

  2. Connect causes and effects: exposure (Internet, cloud, remote work, third parties, Shadow IT) vs. protections (MFA, tested backups, EDR, patching, awareness).

  3. Show the impact of compliance (GDPR, NIS2, ISO 27001, DORA, CaRE) on exposure reduction.

  4. Prioritize: 5 actions with the best euro / risk-reduction ratio.

  5. Justify a budget in front of CEO/CFO/Excom with quantified scenarios and a clear ROI.

Recent reports confirm the value of this data-driven approach: the average cost of a breach keeps rising, risk remains #1 for companies, and the dominant vectors (email, vulnerabilities, third parties) require concrete, measurable measures.



How to get started right now (10 minutes)

  • 1) Initial measurement: calculate your 0-100 score and costs (typical, low, high).

  • 2) Mapping: identify your 3 main attack surfaces (Internet exposure, privileged accounts, third parties).

  • 3) Quick wins:

    • MFA everywhere (email, VPN, admins, third-party access)

    • Tested backups + an immutable copy

    • NDR / DPI + centralized logs

    • Patching of known/exploited vulnerabilities

    • Email hardening (SPF/DKIM/DMARC, dual approvals on finance)

  • 4) Compliance: identify your NIS2/DORA obligations and the gap to close; compliance reduces operational risk - it is not just a checkbox.


Go further (free)

You can run this measurement immediately with Simulateur Cyber:

  • Score, cost scenarios, recommendations, PDF export.

  • Takes into account sector, size, exposures/protections and GDPR/NIS2/ISO 27001/DORA/CaRE.

    https://www.simulateurcyber.fr

Recent sources

  • Allianz Risk Barometer 2025: cyber incidents = #1 global risk (4th consecutive year).

  • ENISA Threat Landscape 2024: availability leads, then ransomware and data exfiltration (EU).

  • IBM Cost of a Data Breach 2024: average cost $4.88M (+10%/year).

  • Verizon DBIR 2025: 2025 trends (credential theft, exploited vulnerabilities, third parties).

  • FBI IC3 2024: BEC = $2.8B in losses (six-figure amounts common).

  • Coveware Q4 2024: 25% of victims pay; median ~$110k for remaining payments.