CyberSilo Cyber Resilience Score: Benchmarking European Security Maturity

Defining the Cyber Resilience Score: A European Security Benchmark

The CyberSilo Cyber Resilience Score rates an organisation from 1.0 (Initial) to 5.0 (Optimised) across eight core security domains, weighted by regulatory criticality. The framework draws directly from ENISA’s cybersecurity maturity assessment guidelines, the NIS2 Article 21 risk-management measures, and the operational resilience testing requirements under DORA. Each domain score is assessed against control evidence, not self-reported claims, producing a quantitative baseline that translates directly into compliance posture and risk exposure.

The eight assessed domains are: Governance & Risk Management; Access Control & Identity Management; Network & Infrastructure Security; Application & Data Security; Threat Detection & Response (SIEM/SOC); Incident Response & Recovery; Supply Chain & Third-Party Risk; and Compliance & Audit Readiness. Each domain carries a maximum of 100 points, weighted by regulatory impact under NIS2 Annex I and II sector categorisations. The final score aggregates domain-level results into an overall maturity tier.

Why European Organisations Need a Specific Maturity Framework

Generic cybersecurity maturity models—such as the C2M2 or SSEMM—offer valuable baselines but lack the regulatory specificity required for European compliance. The NIS2 Directive introduces mandatory risk-management measures across 18 sectors, with specific obligations for incident reporting (Article 23), supply chain security (Article 21(2)(d)), and the use of cryptography (Article 21(2)(f)). A generic model cannot differentiate between an organisation subject to NIS2’s stringent essential entity obligations and one operating under lighter regulatory oversight.

The CyberSilo Resilience Score addresses this by embedding regulatory weightings directly into the scoring methodology. For example, an organisation classified as an essential entity under NIS2 receives higher point allocations for threat detection and incident response domains, reflecting the Directive’s emphasis on proactive monitoring and timely reporting. Similarly, DORA-regulated financial entities have their ICT risk management and digital operational resilience testing domains weighted more heavily, aligning with Title II and Title IV of the Regulation.

Mapping to Key EU Regulatory Frameworks

The score’s eight-domain structure aligns with the control families in ISO/IEC 27001:2022 Annex A, the NIS2 Article 21 risk-management categories, and the GDPR Article 32 security of processing requirements. Each control within a domain is assigned a regulatory relevance score—for instance, ISO 27001 Annex A control 8.16 (monitoring activities) is weighted at 95% for NIS2 essential entities but at 70% for organisations under GDPR-only obligations. This granularity ensures that a high Resilience Score inherently signals multi-standard compliance readiness.

The framework also incorporates the NIST Cybersecurity Framework (CSF) 2.0 functions—Govern, Identify, Protect, Detect, Respond, and Recover—as a secondary alignment layer. This dual-mapping enables organisations that operate in both EU and international contexts to maintain a single maturity benchmark that satisfies multiple regulatory and contractual requirements.

How the CyberSilo Cyber Resilience Score Is Calculated

The assessment process follows a structured, evidence-based methodology designed for enterprise-scale deployment. CyberSilo’s security consultants collect control evidence through automated tooling, policy document analysis, configuration audits, and stakeholder interviews. Each domain receives a raw score between 0 and 100, calculated as the percentage of applicable controls that are fully implemented and operating effectively. Partial implementation (e.g., a policy exists but is not universally enforced) reduces the score proportionally.

The domain scores are then weighted according to the organisation’s regulatory classification—essential entity, important entity, or other—and aggregated to produce the final Resilience Score. A score of 400–599 (Established) typically satisfies NIS2 minimum requirements for important entities, while 600+ (Advanced) is recommended for essential entities and DORA-regulated firms. The score includes a regulatory compliance breakdown, showing the percentage of controls satisfied per framework, so organisations can prioritise remediation based on the most pressing compliance deadlines.

Comparing the CyberSilo Score to Other Maturity Models

Organisations often ask how the CyberSilo Cyber Resilience Score differs from established frameworks like ISO 27001 certification audits, C2M2, or the NIST CSF maturity tiers. The answer lies in three specific design choices: regulatory weighting, evidence granularity, and operational outcome focus.

ISO 27001 certification provides a binary pass/fail outcome—an organisation either achieves certification or it does not. While this is valuable for contractual assurance, it offers limited granularity for measuring year-over-year improvement or identifying specific regulatory compliance gaps. The CyberSilo Score produces a continuous scale that tracks incremental progress, even between certification cycles, and maps directly to specific NIS2 or DORA obligations.

The C2M2, developed by the U.S. Department of Energy, is sector-specific and lacks the regulatory alignment required for European compliance. Its ten domains do not include dedicated controls for GDPR data protection principles or NIS2 supply chain security. The CyberSilo Score’s eight domains are tailored to include these European-specific requirements, with the supply chain domain explicitly mapping to NIS2 Article 21(2)(d) and the data security domain aligning with GDPR Article 32(1)(a) through (d).

Benchmarking Against Peer Organisations

One of the most valuable outputs of the CyberSilo Cyber Resilience Score is the peer benchmarking capability. Organisations receive anonymised comparisons against sector peers, regulatory peers (e.g., all essential entities in the financial sector), and size-matched peers (by employee count and revenue). This context transforms an absolute score into a relative strategic insight—an Advanced rating might be exceptional for a mid-sized manufacturer but below average for a Tier 1 bank under DORA.

Benchmarking data is drawn from CyberSilo’s client assessments across European markets, segmented by NIS2 sector classification, EU member state, and revenue band. Organisations can see, for example, that the average Threat Detection & Response score for essential entities in the energy sector is 540 (Established), while their own score of 480 indicates a 60-point gap requiring investment in SIEM modernisation or SOC process maturity. This data-driven prioritisation is significantly more actionable than a generic recommendation to “improve detection capabilities.”

Using the Resilience Score to Drive Regulatory Compliance and Investment

The CyberSilo Cyber Resilience Score is not a static rating—it is designed to inform remediation planning and budget allocation. Each domain score includes a gap analysis that identifies the specific controls responsible for the score deficit, along with the estimated effort and cost to remediate. For example, a low Incident Response & Recovery score (below 300) would trigger a recommendation to implement a structured incident response plan aligned with NIS2 Article 23 reporting timelines and, where applicable, DORA Title III ICT-related incident management requirements.

CISOs and GRC leads can use the score to structure Board-level reports that translate security maturity into business risk language. A current score of 350 (Developing) with a twelve-month target of 550 (Established) can be framed as a strategic initiative to reduce the probability of a reportable incident from high to moderate, directly supporting the organisation’s risk appetite statement. The score also facilitates conversations with external auditors, regulators, and cyber insurance underwriters who increasingly require objective maturity evidence.

Integrating with Existing ISO 27001 and GRC Programmes

Organisations that already maintain an ISO 27001 ISMS can use the CyberSilo Score as a continuous improvement mechanism between surveillance audits. The score’s domain-level granularity allows the ISMS manager to identify which Annex A controls are underperforming and prioritise corrective actions before the next certification audit. Similarly, GRC automation platforms can ingest the score outputs to trigger automated workflows—such as control testing, evidence collection reminders, and stakeholder notifications—streamlining the compliance maintenance process.

The score also supports multi-framework alignment. An organisation pursuing both ISO 27001 certification and NIS2 compliance can see a single domain-level view that shows which controls satisfy both standards simultaneously, reducing duplication of effort and audit fatigue. The regulatory compliance breakdown feature explicitly maps each control to the relevant standard or Directive, showing shared coverage and framework-specific gaps.

Limitations of Self-Assessment and the Value of Third-Party Validation

While self-assessment tools can provide a preliminary indication of maturity, the CyberSilo Cyber Resilience Score is designed to be delivered as a validated assessment conducted by certified cybersecurity consultants. Self-assessments consistently produce inflated scores—research from ENISA’s National Cybersecurity Capabilities Assessment (NCCA) framework indicates that self-reported maturity levels are typically 20–35% higher than independently verified results. This overconfidence gap is particularly pronounced in incident response and threat detection domains, where organisations overestimate their readiness until a real incident tests their procedures.

CyberSilo’s assessment process includes control testing, configuration validation, and stakeholder verification to eliminate this bias. The final score is accompanied by a detailed evidence pack that can be presented to auditors, regulators, and Board members as a defensible maturity baseline. This validation also ensures that the peer benchmarking data remains accurate and trustworthy, as all scores in the dataset are verified through a consistent methodology.

Case Study: Improving from Developing to Established in Six Months

A medium-sized logistics provider classified as a NIS2 important entity engaged CyberSilo for a baseline maturity assessment in Q1 2025. The organisation scored 310 (Developing), with critical gaps in Threat Detection & Response (score: 240) and Incident Response & Recovery (score: 190). The primary deficits were the absence of a formal SIEM platform, no documented incident response plan, and ad-hoc vulnerability management practices.

CyberSilo’s vCISO team developed a six-month remediation plan focused on three priority actions: deploying a cloud-native SIEM solution for real-time log correlation and alerting, implementing a structured incident response framework aligned to NIS2 Article 23 reporting requirements, and establishing a continuous vulnerability management programme with monthly scanning cycles. The organisation also leveraged CyberSilo’s advisory services to draft the incident response plan and train the internal IT team on first-response procedures.

By Q3 2025, the reassessment produced an overall score of 520 (Established), with Threat Detection & Response rising to 540 and Incident Response & Recovery to 480. The organisation achieved NIS2 compliance readiness and reduced its estimated mean time to detect a critical incident from 14 days to under 6 hours. The CyberSilo Score provided the quantifiable evidence needed to demonstrate regulatory compliance to the national competent authority during an early engagement.