What’s the Difference Between Penetration Testing and Vulnerability Scanning?

Penetration testing and vulnerability scanning are often confused with one another. They both answer different questions, though. 

A vulnerability scan uses automated tools to identify weaknesses across your systems without attempting to exploit them. A scan often becomes out of date the moment it finishes. This is why it needs to run frequently. 

A penetration test goes further. It actively attempts to exploit discovered weaknesses the way a real attacker would. It shows not just what could go wrong, but how, and what the business impact would be.

Both of these matter. Frequent vulnerability scans catch new weaknesses as they appear. Periodic penetration testing proves whether those weaknesses, and the ones automated tools miss, can be used against you.

Does Your Business Need a Penetration Test?

If your business handles customer payment data, health records, or other regulated information, the answer is almost always yes. Penetration tests are very needed. This is both for your own security and because a compliance framework likely requires it. Beyond compliance, a penetration test is one of the clearest ways to know (with evidence) whether your current defenses would hold up against a real attempt to breach them. 

According to Verizon’s 2026 Data Breach Investigations Report, 31% of breaches now start with a software vulnerability. That is exactly the kind of weakness a penetration test is designed to reveal before it gets exploited.

How Often Should You Run A Penetration Test?

Testing frequency depends heavily on which compliance framework applies to your business.

• PCI DSS is the most prescriptive. According to Accountable’s compliance testing checklist, both internal and external network and application testing must run at least every 12 months. It then runs again after any significant infrastructure or application change. Businesses processing card payments should treat annual testing as a bare minimum for what’s required.
• SOC 2 does not mandate a fixed schedule. Still, annual testing is the common standard organizations use to demonstrate their security controls are being validated regularly.
• HIPAA does not currently set a specific testing interval under the Security Rule. It requires ongoing risk analysis though. Annual testing has become the practical norm for healthcare organizations that are validating the security of systems, when those systems involve patient data.
• ISO 27001 ties testing frequency to your own documented risk assessment rather than a universal number. This means the right cadence depends on what your risk-treatment plan calls for.

Whatever your specific framework requires, an annual penetration test, paired with testing after any major infrastructure change, is a reasonable baseline for most small and mid-sized businesses.

What Happens During an infinIT Penetration Test?

Penetration testing done by infinIT evaluates your systems the same way an attacker would. It identifies individual weaknesses and the various ways they could be chained together to gain deeper access. Findings are delivered in plain business language, so your team understands what was found and what it means for your business (clearly showing what to fix first).

Penetration testing works alongside infinIT’s broader managed security services. Findings feed directly into ongoing monitoring and remediation, making sure the reports are acted upon.

How Do You Find Out What an Attacker Would Find First?

A penetration test replaces assumptions about your security posture with evidence. If it has been more than a year since your last test, or you have never run one, talk to infinIT’s team about what a test would look like for your environment. 

Penetration testing is part of infinIT’s broader cybersecurity services, built to work together in a well-connected set of purchases.