How to read a penetration test report

What a penetration test is, and is not

A penetration test is an authorized, simulated attack on your systems by security professionals. Unlike an automated vulnerability scan, testers try to chain weaknesses together the way a real attacker would, for example using a weak password on one system to reach sensitive data on another. The result shows what an attacker could realistically achieve, not just a list of missing patches.

A test is a snapshot. It covers the systems agreed in the scope during a set period, and it does not prove you are secure. A clean report on a narrow scope can be less meaningful than a report with findings on a broad, realistic scope. Always read findings in the context of what was tested.

Start with the executive summary and scope

The executive summary is written for leadership. It should describe what was tested, the overall level of risk, the most serious findings and what an attacker could have done with them. If the summary is full of jargon, ask the testing firm to explain it in plain language. That is part of the service you paid for.

Then read the scope and methodology sections. Check that the tested systems match what you intended, such as external internet-facing systems, the internal network, a web application or Microsoft 365. Note anything excluded and whether the test was done with or without staff knowledge, since both affect how to interpret the results.

Understand the risk ratings

Most reports rate each finding as critical, high, medium, low or informational, often using a scoring system such as CVSS. Ratings are a starting point, not the final word. A medium finding on the server that holds your client files may matter more to you than a high finding on an isolated test system. Ask how each finding applies to your actual business.

Look for attack paths or narratives. These sections describe how testers combined several findings to reach a goal, such as domain administrator access. They are often the most useful part of the report, because fixing one link in the chain can break the whole path. Prioritize fixes that break the most paths at once.

• Critical and high: plan fixes within days to weeks
• Medium: schedule within the next few months
• Low and informational: review and address with routine work

Turn findings into a plan

Each finding should include evidence, an explanation of the impact and a recommended fix. Create a simple remediation tracker listing each finding, who owns it, the target date and its status. Group related items, since several findings often share one root cause, such as missing patches or weak password policy.

Some fixes will be quick configuration changes, while others involve budget or replacing old systems. Where a fix is not practical right away, record a compensating control and a date to revisit it. Be honest in the tracker, because it will guide the next test and may be requested by insurers or clients.

Retest and repeat

Ask the testing firm to retest critical and high findings after you have addressed them. A retest confirms the fixes actually work and gives you a clean record to share with stakeholders. Many firms include a retest in their pricing or offer it at a reduced cost. Keep the retest results with the original report so the full history is in one place.

Plan regular testing, typically annually, and after major changes such as a new office network, a new client portal or a move to a different cloud platform. Compare reports year over year. Fewer repeat findings is a strong sign your security program is improving, even if new issues appear. Share a summary of progress with leadership so security improvements stay visible.