PCI DSS Vulnerability Scanning: Map Requirements to Tools and Pass Your Audit
Written by the Rafter Team
PCI DSS vulnerability scanning is the set of automated security checks that satisfy the Payment Card Industry Data Security Standard's requirements for finding and fixing vulnerabilities in your cardholder data environment. PCI DSS 4.0 specifies exactly which scanning types you need, how often they must run, and what evidence auditors expect. Getting this wrong means failed audits, remediation deadlines, and potential fines from your acquiring bank.
PCI DSS 4.0 made continuous scanning expectations explicit. Requirements that previously accepted quarterly-only evidence now include language requiring "ongoing" and "automated" vulnerability detection. If your scanning strategy relies on quarterly reports alone, you will face auditor pushback.
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PCI DSS 4.0 Requirements Mapped to Scanning Tools
Five PCI DSS requirements directly mandate vulnerability scanning. Each maps to a specific tool type.
| Requirement | What It Demands | Scanning Tool |
|---|---|---|
| 6.2.4 | Prevent common software vulnerabilities (OWASP Top 10) | SAST — static analysis on every build |
| 6.3.1 | Identify and manage vulnerabilities in custom and bespoke software | SAST + SCA — code flaws and dependency CVEs |
| 6.3.2 | Maintain inventory of custom software and third-party components | SCA — dependency tree mapping |
| 11.3.1 | Internal vulnerability scans at least quarterly | DAST + infrastructure scanning |
| 11.3.2 | External vulnerability scans by an ASV at least quarterly | ASV-certified external scan |
Requirements 6.x focus on the software you build. Requirements 11.x focus on the infrastructure you deploy to. You need both categories covered to pass.
Quarterly ASV Scans vs Continuous Scanning
PCI DSS requires external scans by an Approved Scanning Vendor at least quarterly (11.3.2). These ASV scans probe your public-facing infrastructure for known vulnerabilities and produce a pass/fail report your QSA reviews directly.
Quarterly is the floor, not the ceiling. Internal scans (11.3.1) must also run quarterly at minimum, but 4.0's language pushes toward continuous detection. Requirement 6.2.4 expects automated tooling integrated into your development process — not a quarterly batch job.
The practical split looks like this:
- Quarterly ASV scans — external, required for compliance, run by a PCI-certified vendor against your public attack surface.
- Continuous internal scanning — SAST and SCA in CI/CD on every commit, DAST against staging environments on every deploy. This satisfies requirements 6.2.4, 6.3.1, and 6.3.2 and produces the audit trail that strengthens your 11.3.1 evidence.
Running only quarterly scans leaves three months of undetected vulnerabilities between each report. Auditors increasingly view this as a control weakness.
What Auditors Expect
Your QSA will ask for three things: evidence of scanning, evidence of remediation, and evidence that the process is repeatable.
For requirements 6.x, auditors want to see SAST and SCA integrated into your CI/CD pipeline with logs showing scans ran on every code change. They check that high-severity findings triggered a documented remediation workflow — not just that they were found.
For requirements 11.x, auditors review your quarterly ASV reports for a passing status and your internal scan reports for trending vulnerability counts. A scan that finds 200 critical vulnerabilities is not a failure — a scan that finds the same 200 critical vulnerabilities two quarters in a row is.
Maintain scan history with timestamps, remediation records, and exception justifications. Auditors treat missing evidence the same as a failed control.
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