PCI DSS is the security standard that governs how organisations handle payment card data. It is defined by the PCI Security Standards Council and applies not only to systems that directly store, process, or transmit cardholder data, but also to any connected systems that could affect the security of that environment.
The standard covers a wide range of controls including network security, access control, vulnerability management, logging, monitoring, and regular security testing. One of the key ideas in PCI DSS is scope. If your network is not properly segmented , systems outside the obvious payment environment may still be considered in scope because they could be used to reach or influence the cardholder data environment.
For penetration testing specifically, PCI DSS 4.0 Requirement 11.4 requires both internal and external penetration testing at least annually and after significant changes. The objective is not simply to produce a report for an auditor, but to validate whether an attacker could compromise in-scope systems or move into them from adjacent parts of the environment.
A breach involving cardholder data can have severe consequences of financial loss, reputational damage, and regulatory penalties.
Organisations preparing for PCI DSS are required to commission external penetration testing and internal penetration testing specifically scoped to the cardholder data environment. Strong network segmentation can help to limit the scope of PCI DSS and reduce the risk of a breach, but it needs to be validated through testing rather than just documented.
Exploitr supports clients with PCI DSS compliance through targeted penetration testing that focuses on the real attack paths to cardholder data.