Pentesting ISO 27001 Penetration Testing
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ISO 27001 Penetration Testing

ISO 27001:2022 does not command a penetration test in one clause, but Annex A control 8.8 (management of technical vulnerabilities) and 8.29 (security testing in development) make regular testing the practical way to demonstrate the control is operating, to your certification body and your own ISMS.

RedSecLabs delivers CREST-accredited penetration testing designed to feed your ISO 27001 ISMS: findings flow into your risk treatment plan, and the report gives your auditor concrete evidence that technical vulnerability management is working. We run ISO 27001 implementation and internal audit services too, so we understand exactly what your certification body is looking for.

CREST Certified Pen Test Provider ISO Certified OSCP Certified Industry Certification

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✓ CREST-accredited testers · ✓ Supports Annex A 8.8 & 8.29 · ✓ Feeds your risk treatment plan · ✓ ISO 27001 auditors in-house · ✓ Free remediation retest
Who this is for

This service fits if you’re..

1
Pursuing certification
Organisations implementing ISO 27001:2022 who need testing evidence before their Stage 2 audit.
2
Surveillance audits
Certified organisations maintaining evidence of technical vulnerability management for annual surveillance.
3
Post-change assurance
ISMS owners who have made significant changes and need testing to satisfy control 8.8.

ISO 27001 Penetration Testing, Quick Facts

Last reviewed: 2026-07-21
Relevant controls
Annex A 8.8 (technical vulnerability management) and 8.29 (security testing in development and acceptance)
Is it mandatory
The standard requires you to manage technical vulnerabilities; penetration testing is the accepted way to evidence that the control operates
Scope
Driven by your ISMS scope and risk assessment, commonly external/internal infrastructure and key applications
Frequency
At least annually and after significant change, aligned to your ISMS review cycle
Output
A report that plugs into your risk treatment plan, with findings, ratings and remediation
Auditor evidence
Demonstrates control 8.8 is implemented and effective for certification and surveillance audits
8.8
Primary Annex A control
2022
Standard version aligned
Annual
Minimum ISMS cadence
CREST
Accredited methodology

How testing supports your ISMS

ISO 27001 is a management-system standard, so what your certification body cares about is evidence that controls are implemented and effective. Annex A 8.8 requires you to obtain information about technical vulnerabilities and take action; 8.29 expects security testing during development. A penetration test is the artefact that demonstrates both, provided its findings actually flow back into your ISMS rather than sitting in a PDF.

We scope the test against your ISMS scope statement and risk assessment, and write findings so they drop straight into your risk treatment plan with owners and treatment decisions. The result is not just a report for the auditor; it closes the loop the standard is actually asking for, information gathered, risk assessed, action taken.

What our ISO 27001 penetration test delivers:
Testing scoped to your ISMS scope statement and risk assessment
Findings structured to feed directly into your risk treatment plan
Coverage of infrastructure and applications relevant to your scope
Evidence that Annex A 8.8 is implemented and operating effectively
CVSS-rated findings with owners and remediation guidance
A remediation retest to evidence closure for your auditor

Because we also deliver ISO 27001 implementation and internal audits, the test is built to satisfy a certification auditor, not just to find bugs.

Where ISO 27001 testing falls short

The frequent gap is a disconnect between the test and the ISMS. A penetration test that never makes it into the risk treatment plan, or findings with no owner and no treatment decision, tells an auditor the control is not really operating. Equally, a test scoped without reference to the ISMS scope can miss the assets the certification actually covers.

We close that gap by scoping against your documented ISMS and delivering findings in the language of risk treatment, so the evidence is coherent end to end.

Common ISO 27001 testing pitfalls:
Test results that never reach the risk treatment plan
Findings with no assigned owner or treatment decision
Scope that does not match the ISMS scope statement
No evidence of remediation or retest for closed findings
Testing treated as a one-off rather than a recurring control
Reports too technical to demonstrate management-level control

An auditor is assessing whether your control operates, not whether you own a report. We deliver testing that evidences the former.

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Penetration Testing That Supports Certification

Tell us your ISMS scope and audit timeline and we’ll scope testing that evidences Annex A 8.8, with a fixed quote within one working day.

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Where to next

Related services worth exploring.

ISO 27001 Certification

Full ISMS implementation and certification support

ISO 27001 Internal Audit

Independent internal audit for your ISMS

SOC 2 vs ISO 27001

Compare the two frameworks and their testing needs

Frequently Asked Questions

Not in a single explicit clause, but Annex A control 8.8 requires you to manage technical vulnerabilities, and penetration testing is the accepted way to demonstrate that control is implemented and effective. In practice, certification bodies expect to see regular testing evidence, so it is effectively required to pass and maintain certification.

Primarily 8.8 (management of technical vulnerabilities) and 8.29 (security testing in development and acceptance). A test also provides evidence relevant to 8.9 configuration management and the broader risk-assessment requirements in the main clauses of the standard.

We scope against your ISMS scope statement and risk assessment, and deliver findings structured to drop into your risk treatment plan with owners and treatment decisions. That way the test evidences the full loop the standard expects: identify, assess, treat.

At least annually and after any significant change to systems in scope, aligned to your ISMS review and internal audit cycle. Certification bodies look for a consistent, repeating cadence rather than a single test before the audit.

We offer both, but we keep them independent where needed. Our ISO 27001 internal audit service and penetration testing can be delivered together as a coherent evidence package, while respecting the separation your certification body expects.

ISO 27001:2022, including the restructured Annex A controls. If you are still transitioning from the 2013 version, we can scope testing that supports the updated control set your certification will be assessed against.
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