“We need a security test” can mean two very different things. A vulnerability assessment and a penetration test are often confused, priced side by side and sometimes sold as the same service. They answer different questions, and most businesses need both at different times.
Vulnerability assessment: what could be wrong?
A vulnerability assessment is a broad, largely automated scan of your systems against databases of known weaknesses. It looks for outdated software, missing patches, misconfigured servers and cloud services, weak TLS settings and exposed ports.
- Wide coverage: it can check hundreds of hosts and applications quickly.
- Repeatable: run it monthly, or continuously, to catch new issues as they appear.
- Limited depth: it reports possible problems, some of them false positives, and does not prove what an attacker could actually do.
Penetration testing: what could an attacker actually do?
A penetration test is a manual, time-boxed attempt by skilled testers to break in, within agreed rules. Testers chain small weaknesses together the way real attackers do, for example an exposed admin page, a weak password policy and a missing permission check, and show the real-world impact.
- Deep: it finds logic flaws that scanners cannot, such as one customer reading another customer’s data.
- Evidence-based: findings come with proof and clear steps to reproduce them.
- A snapshot: it reflects the system as it was during the test window.
Types of penetration test
- Black box: testers start with no inside knowledge, like an outside attacker.
- Grey box: testers get normal user accounts, which is the most common and cost-effective choice for web apps.
- White box: testers also see the code and architecture, for the most thorough review.
Tests can target web applications, APIs, mobile apps, cloud accounts or internal networks. Choose the scope that matches where your sensitive data lives.
How often?
- Vulnerability scans: at least monthly and after major changes, ideally continuously.
- Penetration tests: at least once a year, and before launching a major product or feature, after big architecture changes, or when a customer or auditor asks for one.
Getting the most out of a test
- Agree on scope and rules of engagement in writing: targets, dates, contacts and anything off limits.
- Test a staging copy where possible, with realistic data and the same configuration as production.
- Give testers accounts for each user role, so they can check that permissions really hold.
- Fix findings by severity, then ask for a retest to confirm the fixes.
Where compliance fits
Security tests are often required to show that your controls work:
- SOC 2: a Type I report covers how controls are designed at a point in time, while a Type II report covers how they operated over a period, usually several months. Regular vulnerability management and penetration testing are common evidence for both.
- ISO 27001: expects a risk-based approach to managing technical vulnerabilities.
- GDPR and India’s Digital Personal Data Protection Act, 2023: both require appropriate or reasonable security safeguards for personal data, and testing is part of showing you have them.
A test report alone does not make you compliant, but it is one of the clearest pieces of evidence you can give an auditor or an enterprise customer.
Build security into delivery
The cheapest vulnerabilities to fix are the ones caught before release. Add dependency scanning, secret detection and static code analysis to your CI pipeline, review permissions in code review, and keep an asset inventory so nothing is forgotten. This practice is usually called DevSecOps.
How we can help
We provide cybersecurity and compliance services: penetration testing, vulnerability assessments, SOC 2 and GDPR compliance support, and DevSecOps for engineering teams.
Preparing for an audit or a big customer’s security review? Tell us what you need to show and we will help you scope the right tests.