A cyber security audit is a structured review of your business’s systems, processes and controls to identify weaknesses before they become real problems. It looks at how your environment is configured, how your security processes work in practice, and where your business is most exposed.
This post explains what a cyber security audit involves, how it differs from a scan or penetration test, what a useful report should tell you, and when it makes sense to commission one.
The three types of cyber security audit
The term “cyber security audit” gets used broadly, which is why expectations can get messy. A scan, a penetration test and a broader security review all serve different purposes. The right option depends on what you need to understand.
Vulnerability scan
An automated tool connects to your network, checks for known software vulnerabilities, expired certificates, open ports, and misconfigured systems, and generates a report. It’s fast, relatively affordable, and useful for identifying technical exposures.
What it doesn’t tell you: whether your security processes actually work, whether your staff know what to do, or whether a real attacker would get through.
Penetration test
A penetration test (or pen test) goes further. A security professional attempts to actively exploit the weaknesses in your systems – trying to get in the way an attacker would.
Pen tests are typically commissioned by larger businesses with specific compliance requirements. They’re more expensive and more disruptive than a vulnerability scan, and the findings are more specific.
Maturity assessment
A broader security review looks beyond individual vulnerabilities and considers whether your controls, processes and day-to-day practices are actually reducing risk. For Australian businesses, this may include checking areas such as patching, access control, backups, application control and administrative privileges.
The output should not just be a list of issues. It should explain what each gap means for the business, which risks matter most, and what to fix first.
What happens during a cyber security audit
A cyber security audit typically starts with a scope. The auditor needs to understand the size of your environment, the systems in use, who manages them, and what level of risk or compliance pressure the business is dealing with.
From there, the review usually combines technical checks with evidence gathering. That may include reviewing device settings, user access, Microsoft 365 configuration, backup processes, patching records, security policies and the way incidents are handled.
The most useful audits are practical. They do not stop at “pass” or “fail”. They look at whether the control is working in the real environment and whether the business has a realistic path to improve it.
That usually means speaking with the person responsible for IT, checking whether records match what is happening in practice, and identifying the gaps that create the most immediate business risk.
What the report tells you
A good cyber security audit report gives you a clear picture of where you are exposed and what should happen next. It should separate urgent risk from nice-to-have improvements, so the business is not left with a long, undifferentiated list of technical findings.
At minimum, the report should explain the issue, the likely impact, the evidence behind the finding, and the recommended action.
The best reports also sequence the work. That makes it easier to brief leadership, plan budgets, assign responsibility and track progress over time.
When to commission one
Most businesses wait until something goes wrong. The more useful trigger is any material change to your environment or risk profile.
Common reasons businesses commission an audit:
- Before signing an IT or cyber security contract
- After a significant change
- Annual review
- Before a compliance deadline
The important thing is not to treat an audit as a one-off compliance exercise. Environments change, staff change, software changes and controls drift. The value comes from using the findings to guide steady, practical improvement.
Windstil provides cyber security consulting for Australian businesses. Our active clients enjoy a structured, ongoing approach to Essential Eight, with clear prioritisation, consistent progress and guidance to improve their maturity over time.
