ISO 27001 Penetration Testing Services
ISO 27001 certification is built on evidence. A penetration test is some of the strongest evidence you can produce.
ISO 27001 doesn’t mandate penetration testing by name, but the standard’s approach to risk assessment and technical controls makes it the natural choice for organizations serious about certification. Annex A controls covering information security, access management, and vulnerability management all benefit from independent validation. A well-documented penetration test shows your auditor, your certification body, and your enterprise customers that the controls you’ve implemented have been tested against real-world attack techniques, not just documented in a policy.
The organizations pursuing ISO 27001 today are increasingly doing so because enterprise customers require it, particularly in European markets where the standard carries more weight than SOC 2. The certification signals something specific: that security is a managed program, not a checkbox. The pentest report is part of that signal.
What the Test Covers
ISO 27001 engagements follow the same methodology and deliver the same depth as any Asteros engagement. Web application testing grounded in the OWASP Application Security Verification Standard. External and internal network testing that maps exposure and lateral movement paths. Both, if your certification scope includes the full environment.
The report includes validated findings with proof of concept, an ASVS-based structured assessment for web application scope, remediation guidance written for your engineering team, and an executive summary suitable for your auditor, your certification body, and the enterprise procurement teams that will ask to see it. After remediation, a free retest validates the fixes and produces the closure evidence that demonstrates your vulnerability management process is real and operational, which is exactly what ISO 27001 auditors want to see.
Why the Report Structure Matters
ISO 27001 auditors and certification bodies want to see that risk identification is systematic and documented, that findings were prioritized and addressed, and that the process can be repeated. A scanner dump satisfies none of those requirements. A report that documents methodology, maps findings to risk ratings with business context, and includes a validated retest result satisfies all of them.
The same report also travels well. If you’re pursuing ISO 27001 because enterprise customers require it, the executive summary and attestation letter give you something to hand a procurement team without exposing technical detail.
SOC 2 and ISO 27001 Together
Many companies pursue both frameworks simultaneously or in sequence, particularly SaaS companies selling into both US and European enterprise markets. An Asteros engagement can support both. The report is structured to satisfy SOC 2 Trust Services Criteria and ISO 27001 Annex A controls from the same body of work. You don’t need two separate tests, and you don’t need two separate reports.
ISO 27001 penetration testing FAQs
Is penetration testing required for ISO 27001?
ISO 27001 does not require penetration testing, but most certification audits expect independent technical validation for systems with meaningful risk. For the control-by-control detail, see the ISO 27001 penetration testing requirements and checklist.
When should we schedule the test?
ISO 27001 involves an initial certification audit, annual surveillance audits, and full recertification every three years, and the evidence needs to be current at each one. Annual testing aligned to your surveillance audit cycle is the most defensible approach. If you make major changes to your application or infrastructure between audits, consider additional testing to cover them.
What will our auditor want to see in the report?
Documentation that an independent test was conducted within the certification period, that scope covered the systems identified as material risks, that findings were risk-rated and remediated, and that a retest confirmed the fixes. A methodology section aligned to a recognized standard such as OWASP ASVS strengthens the evidence significantly.
How much does it cost, and how long does it take?
Web application penetration tests start at $10,000 flat per app, and network testing added to an engagement is typically $3,000 to $7,000. Most engagements run about two weeks from kickoff to report delivery, and retesting of fixed issues is included. See pricing.
Can one test cover ISO 27001 and SOC 2?
Yes. The report is structured to satisfy SOC 2 Trust Services Criteria and ISO 27001 Annex A controls from the same body of work. You don’t need two separate tests or two separate reports.
Schedule a Consultation
If you’re preparing for ISO 27001 certification for the first time, heading into a renewal, or adding ISO alongside an existing SOC 2 program, the scoping call is where we figure out what the engagement needs to cover and how it fits your certification timeline.
Or if you’re evaluating vendors, our free guide covers what a rigorous pentest report looks like and what to ask before you commit.
Download the free guide: Audit-Proof Your Pentest →
Want the detail? See the full ISO 27001 penetration testing requirements and checklist.