PCI DSS 11.4.2: Internal Penetration Testing
Internal penetration testing is a critical control that validates your security posture by simulating attacks from within your network. PCI DSS 11.4.2 requires organizations to conduct these tests according to a documented methodology to identify vulnerabilities before real attackers do.
What this means
This control mandates that you regularly perform controlled penetration tests from inside your network perimeter using a defined, repeatable methodology. Unlike external testing, internal pen tests simulate threats from compromised employees or lateral movement by attackers already inside your environment. The methodology must be documented, consistent, and aligned with industry standards.
How to comply
- 1.Document a detailed internal penetration testing methodology that defines scope, tools, techniques, and success criteria
- 2.Define testing frequency—at minimum annually, or after significant network changes
- 3.Engage qualified testers (internal or third-party) with documented credentials and experience
- 4.Execute tests from internal network segments, including restricted and segmented areas
- 5.Document all findings with severity ratings, affected systems, and remediation steps
- 6.Establish a remediation process with timelines based on risk level
- 7.Retain evidence of testing execution and remediation efforts for audit trails
- 8.Review results with management and incorporate findings into your security roadmap
Evidence auditors look for
- Penetration testing methodology document with scope, rules of engagement, and reporting standards
- Annual penetration test reports with identified vulnerabilities and CVSS scores
- Proof of testing execution dates and names of authorized testers
- Remediation tracking logs showing vulnerabilities resolved and re-test confirmation
- Signed agreements with third-party testers outlining methodology and scope
- Network diagrams showing tested segments and internal test locations
- Management review documentation demonstrating oversight of pen test programs
Frequently asked questions
When will FAQs be available?
The FAQ for this control is currently being prepared.
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