Executive Summary
The NCSC CAF is the UK's primary cybersecurity assessment framework for essential services and critical infrastructure. It covers four objectives: Managing Security Risk, Protecting Against Cyber Attack, Detecting Events, and Minimising Impact. Scrutex supports multiple CAF objectives with capabilities across asset management, vulnerability management, supply chain security, and security monitoring.
About NCSC CAF
The CAF provides structured assessment methodology with four objectives, contributing outcomes, and indicators of good practice (IGPs). Applied under the UK NIS Regulations and GovAssure programme. Sector-specific competent authorities apply the CAF in regulatory oversight of Operators of Essential Services.
Geographic and Sector Applicability
Primarily applied to OES under UK NIS Regulations across energy, transport, water, health, and digital infrastructure. Also used by UK government departments under GovAssure and by organisations benchmarking against UK government standards.
Who Should Care
CISO
Owns CAF compliance and assessment readiness.
Board
Objective A1 requires appropriate governance and board engagement.
Supply Chain
A4 specifically addresses supply chain security.
Key Risks of Non-Compliance
Public reporting of assessment results.
Increased supervisory scrutiny.
Potential operational restrictions.
Common Compliance Gaps
Incomplete Asset Management
Contributing Outcome A2 requires comprehensive asset management. External assets are frequently incomplete.
Weak Supply Chain Security
A4 requires managing supply chain cyber risks. Many organisations lack continuous supplier monitoring.
How Scrutex Supports NCSC CAF Compliance
Scrutex capabilities mapped to NCSC CAF requirements.
A2 (Assets) requires comprehensive asset management. B4 (System Security) addresses vulnerability management. Scrutex provides continuous external asset discovery and vulnerability assessment.
Scrutex Capabilities
- ✓Asset discovery
- ✓Vulnerability assessment
- ✓Configuration monitoring
Requirements Addressed
- A2: Asset Management
- B4: System Security
- A3: Risk Assessment
C1 (Security Monitoring) and C2 (Proactive Discovery) require detection capabilities. Scrutex extends monitoring to external and underground sources.
Scrutex Capabilities
- ✓Credential monitoring
- ✓Dark web surveillance
- ✓Telegram monitoring
Requirements Addressed
- C1: Security Monitoring
- C2: Proactive Security Event Discovery
A4 (Supply Chain) requires managing supply chain cyber risks. Scrutex provides continuous supplier security assessment.
Scrutex Capabilities
- ✓Supplier security monitoring
- ✓Supply chain risk scoring
Requirements Addressed
- A4: Supply Chain
Threat intelligence supports risk-informed security decisions across CAF objectives.
Scrutex Capabilities
- ✓IOC feeds
- ✓Ransomware intelligence
- ✓Threat actor tracking
- ✓CVE repository
Requirements Addressed
- A3: Risk Assessment
- C2: Proactive Discovery
Compliance Reporting
Structured evidence supporting CAF assessment processes.
Scrutex Capabilities
- ✓CAF-aligned reporting
- ✓Assessment evidence packages
Requirements Addressed
- CAF assessment documentation
Quick-Start Compliance Checklist
Run external discovery for A2 asset management.
Onboard suppliers into Vendor Insights for A4.
Activate monitoring for C1/C2 objectives.
Enable threat intelligence for risk assessment.
Generate CAF-aligned assessment evidence.
Summary
The NCSC CAF provides a comprehensive assessment methodology for UK essential services and critical infrastructure cybersecurity. Scrutex supports multiple CAF objectives with continuous external visibility, supply chain monitoring, threat detection, and assessment-ready documentation.
Related Regulations and Standards
NIS2: NIS2 transposition will affect UK CAF application as UK develops its own approach.
ISO 27001: Complementary standard widely used alongside CAF.
GDPR / UK GDPR: Data protection requirements apply alongside CAF.
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