Skip to content
Cyber Security Networks & Security

Penetration Testing

Penetration testing aligned to modern security best practices and Microsoft technologies.

Masthead 4-May-01-2026-04-28-24-6337-PM

Proactively strengthen your security posture

Penetration Testing helps businesses uncover hidden vulnerabilities, validate existing controls, and gain clarity on real-world risks.

 

Speak to a specialist person

Top 1% of Microsoft Partners, globally.

We’re an end‑to‑end Microsoft partner, holding all six Solutions Partner designations, five consecutive years of Inner Circle status, 3,000 Microsoft certifications, and Direct CSP status – giving customers priority access, funding routes and expert support.

View partners
  • MSC
  • SEC
  • MODWORK
  • BIZAPPS
  • DIZAPPS
  • DAIZ
  • IAZ
  • MS AE MSP

The hidden risk to business continuity

Businesses face ever-increasing pressure to demonstrate security maturity while keeping pace with an evolving threat landscape. Cyber risks continue to grow in complexity, yet many internal teams lack the time or expertise to continually validate and evolve their defences. 

At the same time, boards and regulators expect stronger proof of assurance, measurable improvements, and confidence that security investments are working as intended. Without independent testing, blind spots persist and operational risk increases. 

The problems we're solving

Limited visibility of real-world vulnerabilities
visibility_off

Uncertainty about which risks matter most to the business
motion_sensor_active

Security controls that remain unvalidated or outdated
emergency_home

Difficulty proving compliance to auditors and stakeholders
policy_alert

Fragmented processes across cloud and on‑premises environments
arrows_output

What this means for your business

Penetration Testing replaces assumption with evidence. You gain a defensible view of real‑world exposure, clearer prioritisation for remediation, and audit‑ready artefacts that show controls are working. The result is a more resilient operation and greater confidence in where to invest next.

Risk Reduction
priority

Focus effort where it matters by mapping genuine attack paths, reducing the probability and impact of a breach on critical services and data.

Managed Services 1-1

Assurance & Compliance
priority

Provide auditors and stakeholders with concise, test‑backed proof of control effectiveness, supporting standards such as Cyber Essentials and related frameworks.

Managed Services 1-1

Operational Resilience
priority

Translate findings into targeted improvements across people, process and technology so core services remain available - even as the environment changes.

Managed Services 1-1

Investment Confidence
priority

Turn technical results into executive‑level insight that shows which actions deliver the greatest risk reduction per pound spent.

Managed Services 1-1

Security Doctor

Check your 'vitals'

Book free assessment

Finding gaps before bad actors

Penetration Testing provides a comprehensive assessment layer across infrastructure, applications, and services, combining automated discovery with deep human expert analysis. 

Speak to a specialist person
  • priority
    priority

    Infrastructure security assessment

    Simulates external and internal attack scenarios to uncover exposed services, misconfigurations, and exploitable weaknesses across networks and hosts.

  • priority
    priority

    Web application assurance

    Tests websites and web applications against recognised standards, uncovering flaws such as injection weaknesses, misconfigurations, and vulnerabilities

  • priority
    priority

    Continuous risk validation

    With repeatable testing ongoing security assurance offers visibility of how risks evolve over time.

What powers our solution

Full‑Spectrum Scanning
priority

Covering TCP/UDP port discovery, multi‑engine web application scanning aligned to the OWASP Top 10, and an extensive library of checks for injection attacks, remote code execution, SSL/TLS weaknesses, misconfigurations and third‑party vulnerability insights.

Standards‑Aligned Methodology
priority

Using CREST‑aligned testing approaches with reporting structured against Cyber Essentials and other recognised compliance frameworks.

Validated Findings
priority

With all results manually reviewed by Node4 security engineers to confirm accuracy, exploitability and real‑world relevance rather than hypothetical risk.

Why Node4?

Speak to a specialist

Independent, CREST‑aligned security expertise
priority

Your testing is led by certified specialists who combine advanced tooling with manual validation, ensuring findings reflect real‑world exploitability rather than automated noise.

Executive‑ready insight, not technical overwhelm
priority

Reports are structured for senior stakeholders as well as engineers, making it clear where risk is concentrated, what actions matter most, and how remediation supports wider business priorities.

For Microsoft, cloud‑first and hybrid environments
priority

As a long‑standing Microsoft partner, we understand the complexities of modern architectures and tests your environment with full awareness of cloud identity, API surfaces and integration patterns.

Repeatable assurance model for ongoing compliance
priority

Whether aligned to Cyber Essentials, industry regulation or internal audit cycles, Node4 provides a clear, consistent method that supports continuous control validation and governance.

Delivered by a UK-based security and resilience specialist
priority

With extensive experience across regulated, multi‑site and complex businesses, Node4 gives you the confidence that your testing is handled securely, transparently, and with a deep understanding of business-critical operations.

Lets talk Security

Independent security validation creates confidence, accelerates improvement, and strengthens long‑term resilience. If you want to understand your true exposure and take decisive action, we’re here to help. 

Speak to a specialist