Home / Industry-Aligned Testing / ISO 27001
ISO 27001 Penetration Testing
ISO 27001 Penetration Testing
Independent penetration testing that provides the technical assurance and evidence expected behind an ISO/IEC 27001 Information Security Management System, supporting certification, surveillance audits and continual improvement.
Overview
Testing aligned to your ISMS
ISO/IEC 27001 does not prescribe a specific tool or test. However, Annex A controls such as A.8.8 (management of technical vulnerabilities) and A.8.29 (security testing in development and acceptance), read alongside your risk assessment and treatment plan, make regular penetration testing the practical way to demonstrate they are working.
We scope the assessment against your Statement of Applicability and risk register, test the systems that matter, and deliver evidence your certification body and internal auditors can rely on.
What you'll receive
- ✓Scoping: a test plan aligned to your Statement of Applicability and ISMS risk assessment
- ✓Testing: external, internal and application coverage mapped to Annex A (A.8.8, A.8.20, A.8.29)
- ✓Executive report: a management summary for your leadership and certification body
- ✓Technical report: risk-rated findings with clear, prioritised remediation guidance
- ✓Audit evidence: methodology and results formatted for Stage 2 and surveillance audits
- ✓Retest: a complimentary retest to confirm remediation and refresh the evidence
Why It Matters
How testing supports ISO 27001
Certification and surveillance auditors expect to see evidence that technical vulnerabilities are identified and managed. A structured penetration test provides exactly that.
Audit evidence
Demonstrable proof for your certification body that Annex A technical controls are implemented and effective.
Annex A alignment
Directly supports A.8.8 technical vulnerability management and A.8.29 security testing controls.
Risk-driven scope
Testing focused on the assets and threats identified in your ISMS risk assessment and treatment plan.
Continual improvement
Clear, prioritised findings that feed your improvement cycle and reduce risk year on year.
What We Test
Testing aligned to ISO 27001 Annex A
External infrastructure testing
Internet-facing services and perimeter exposure, supporting A.8.8 and A.8.20.
Internal network penetration testing
Lateral movement and privilege-escalation paths across the internal estate (A.8.8, A.8.22).
Web application & API testing
OWASP-aligned assessment of business applications and interfaces (A.8.8, A.8.29).
Access control & authentication
MFA, session management and role-based access review (A.5.15, A.8.5).
Technical vulnerability management
Validation of patching and vulnerability handling under A.8.8.
Secure configuration review
Hardening of servers, endpoints and cloud services (A.8.9).
Cryptography & data in transit
TLS configuration and encryption coverage (A.8.24).
Cloud & hosting security
IAM, storage and network controls in your cloud environment (A.5.23).
Network segregation controls
Segmentation and filtering between trust zones (A.8.20, A.8.22).
Logging & monitoring
Gaps in audit trails and detection found during testing, informing A.8.15 and A.8.16.
Secure development & acceptance
Security testing within the SDLC and release process (A.8.29).
Remediation evidence & retest
Findings mapped to Annex A controls and re-tested for your audit.
Applicable Pentest Phases
The pentest phases behind an ISO 27001 engagement
An ISO 27001 engagement is assembled from the individual assessments below, scoped to your Statement of Applicability. Each phase links to the full service.
Infrastructure Testing
Internal and external network testing, the core evidence for A.8.8 technical vulnerability management.
Web Application Testing
OWASP-aligned testing of business applications, supporting A.8.8 and A.8.29.
API Penetration Testing
Testing of the interfaces that connect your ISMS-critical systems and data flows.
Cloud Security Review
IAM, storage and network configuration review supporting A.5.23 cloud services.
Server & End-User Device Review
Build and hardening review evidencing A.8.9 configuration management.
Social Engineering
Phishing and human-factor testing that evidences your awareness and training controls.
FAQ
Frequently asked questions
Does ISO 27001 require a penetration test?
ISO/IEC 27001 does not explicitly mandate a penetration test, but Annex A.8.8 and A.8.29, combined with your risk assessment, make it the most practical and widely accepted way to evidence technical vulnerability management. Certification auditors routinely expect to see regular testing.
Which Annex A controls does a penetration test support?
Primarily A.8.8 (management of technical vulnerabilities) and A.8.29 (security testing in development and acceptance), and it also provides supporting evidence for your risk assessment and treatment activities under Clauses 6 and 8.
How often should we test for ISO 27001?
We recommend testing at least annually and after any significant change to in-scope systems. This aligns naturally with the ISO 27001 surveillance audit cycle and your continual improvement obligations.
Will the report be accepted as audit evidence?
Yes. Our reports include an executive summary, risk-rated findings mapped to Annex A controls, remediation guidance and retest results, all formatted so your certification body and internal auditors can use them directly as evidence.
What is typically in scope?
Scope is driven by your Statement of Applicability and risk register, and commonly includes external and internal infrastructure and business-critical applications. We agree the exact scope with you during a short scoping call.
Preparing for ISO 27001?
Talk to our consultants about scoping a penetration test that evidences your ISMS, or get an instant quote for your assessment.