ISO 27001 Penetration Testing & Vulnerability Analysis
Expert-led testing that satisfies your ISO 27001 requirements, and goes further.
Our CREST-accredited consultants deliver the manual, expert-led penetration testing and vulnerability analysis your ISO 27001 programme requires, with reporting that satisfies your certification body and gives your security team something it can actually act on.
ISO 27001 & Penetration Testing
What Does ISO 27001 Require From Penetration Testing?
ISO 27001 doesn’t mandate a specific testing methodology, but it does require that your organisation takes a systematic approach to identifying and managing technical vulnerabilities. The key control is Annex A 8.8 (formerly A.12.6.1 in the 2013 standard), which requires that information about technical vulnerabilities is obtained in a timely manner, your exposure is evaluated, and appropriate measures are taken to address the associated risk.
In practice, this means your ISMS needs to demonstrate:
- Regular, structured testing of systems within the scope of your ISMS
- A process for ranking and treating identified vulnerabilities against your risk criteria
- Evidence that security controls are working as intended
- Documentation suitable for review by your Certification Body (CB) during surveillance and recertification audits
Our testing and reporting is designed to satisfy all of these requirements, and to provide genuine security assurance, not just audit evidence.
ISO 27001 Testing
How We Support Your ISO 27001 Programme
Our ISO 27001 testing can be deployed at every stage of the certification and maintenance lifecycle, from initial certification through to ongoing ISMS compliance.
Initial Certification
Working towards ISO 27001 certification for the first time? Penetration testing provides the technical evidence your Certification Body needs to validate that your controls are operating effectively. We scope our testing to the boundaries of your ISMS, identify vulnerabilities across your in-scope systems, and produce reporting that maps directly to your risk treatment plan.
Recertification Audits
ISO 27001 is not a one-time achievement, it requires ongoing demonstration of compliance through annual surveillance audits and full recertification every three years. Regular penetration testing is one of the clearest ways to demonstrate to your Certification Body that your organisation is actively managing technical risk and continually improving its security posture.
Ongoing ISMS Improvement
What is secure today may be vulnerable tomorrow. New systems, new services, and an evolving threat landscape mean that your attack surface changes constantly. We work with organisations as a long-term testing partner, providing regular assessments that keep your ISMS grounded in the current state of your environment, not last year's.
Test Coverage
What Does Our ISO 27001 Testing Cover?
ISO 27001 Reporting
Reporting For ISO 27001 Compliance
Our ISO 27001 reports are written to serve two audiences: your security and IT teams, who need clear technical detail and actionable remediation guidance; and your Certification Body, who needs evidence that your organisation is systematically identifying and treating technical vulnerabilities in accordance with your ISMS.
Every report includes:
- Executive summary suitable for senior management and CB review
- Full technical findings with severity ratings mapped to your risk criteria
- Clear remediation guidance for each identified vulnerability
- Retest documentation confirming that identified issues have been resolved
- Supporting documentation for Annex A control evidence on request
Need Full ISO 27001 Consultancy Support?
Penetration testing is one part of ISO 27001. If your organisation needs broader support such as gap analysis, ISMS development, risk assessment, or full certification consultancy, our sister company Xcina Consulting is a BSI Platinum Member offering a complete range of ISO 27001 services.
Between Pentest Limited and Xcina Consulting, your organisation has access to both the technical testing and the compliance consultancy needed to achieve and maintain ISO 27001 certification.
Our Approach
Our ISO 27001 Testing Process
Our ISO 27001 testing goes through a rigorous process to ensure you get the best possible results. Below we outline the key stages our testing goes through:.
Understand Your Requirements
We begin every engagement by understanding the scope of your ISMS, your certification stage, and what your Certification Body requires. Whether you're preparing for initial certification or building a long-term testing programme, we'll scope and propose the right assessment for your needs.
Manual, Expert-Led Testing
Your assessment is carried out by directly employed, CREST-certified consultants. We use tooling to support our work, but every finding is the result of manual investigation, not automated output. This means validated vulnerabilities, no false positives, and evidence your Certification Body will accept.
Reporting Aligned To Your ISMS
Our reports are written to satisfy both your internal security team and your Certification Body. Findings are mapped to Annex A controls, severity ratings are aligned to your risk criteria, and executive summaries provide the management-level overview your ISMS documentation requires.
Post-Test Remediation Support
We remain available after delivery to support remediation, answer questions from your Certification Body, and provide fix checks to confirm vulnerabilities have been resolved. Additional documentation for audit and certification purposes is available on request.
Contact Us
Discuss Your ISO 27001 Testing Requirements
Whether you’re preparing for initial certification or looking for a long-term testing partner to support your ISMS, we’re happy to talk. Fill in the form below and a member of our team will be in touch.