What are 5 Stages of Penetration Testing?

Fiza Nadeem
June 18, 2025
10
min read

Penetration testing involves trying to break into various application systems, such as APIs or servers, to find security weaknesses. This can include issues like unsanitized inputs that could allow code injection attacks.

The results from the penetration test can help improve your Web Application Firewall (WAF) security rules and fix any vulnerabilities that are found.

In this blog, we will discuss the five main stages of penetration testing: Reconnaissance, Scanning, Vulnerability Assessment, Exploitation, and Reporting.

Reconnaissance

The first stage, called Reconnaissance, is the starting point of the whole process. During this phase, the tester gathers information about the target system. This can include details such as IP addresses, domain names, network services, mail servers, and how the network is organized.

This early collection of information creates a clear picture of the target's environment. With this knowledge, the tester can plan a focused testing approach to find possible weaknesses. This prepares the way for the next steps in the penetration testing process.

How Does ioSENTRIX Perform this Phase?

  • Open-Source Intelligence (OSINT) Collection.
  • Network Enumeration and Mapping.
  • Human Element Profiling.
  • Business Logic Mapping.
  • Target Fingerprinting.
  • Customized Strategy.

Scanning

The next step is the scanning phase. In this stage, a thorough technical check of the target system is performed. Tools such as vulnerability scanners and network mappers are used to see how the system reacts to different types of access or attacks.

Scanning helps testers understand how the target application acts in different situations and find possible weak spots that could be taken advantage of. It creates a map of the system’s digital environment to allow the tester identify potential entry points that an attacker might use.

How Does ioSENTRIX Perform this Phase?

  • In-House and Open-Source Tools.
  • Human Intelligence + Automation.
  • Layered Scanning Strategy.
  • Continuous Feedback Loop.
  • Asset-Specific Scanning.
  • Live Response Mapping.

You may want to read: How to Choose the Right Penetration Testing Services Provider for Your Business?

Vulnerability Assessment

After completing a detailed scan of the target system, the next step is the Vulnerability Assessment. In this stage, a careful review is done to find points that could be exploited by attackers.

The tester uses both automated tools and manual methods to check the security of the systems. They carefully look for any gaps that could be taken advantage of. This detailed review helps understand the overall security of the system and highlights potential vulnerabilities that cybercriminals might exploit.

How Does ioSENTRIX Perform this Phase?

  • Layered and Asset-Specific Coverage.
  • Manual Verification & Proof-of-Concept.
  • Industry-Grade Compliance Mapping.
  • Hybrid Testing Methodology.
  • Context-Aware Evaluation.
  • Detailed Deliverables.

You may find it interesting: Vulnerability Assessment vs Penetration Testing.

Exploitation

In this important phase, the tester tries to use the weaknesses found earlier. The goal is not to cause harm but to understand how serious the vulnerabilities are and to evaluate what kind of damage they could lead to.

During exploitation, actions may include accessing sensitive data without permission, disrupting services, or causing data breaches. This step must be carefully managed and watched closely to prevent any accidental damage to the system. It requires a careful balance between testing the limits and protecting the system’s integrity.

5 Stages of a Penetration Testing Process

How Does ioSENTRIX Perform this Phase?

  • Proof-of-Concept (PoC) Demonstrations.
  • Business Context Alignment.
  • Controlled, Safe Exploitation.
  • Risk-Based Prioritization.
  • Multi-Layered Attacks.
  • Stealth and Realism.

Reporting

The last step is Reporting, where the tester creates a detailed report of their findings. This report includes the vulnerabilities found, the data accessed, and how successful the simulated breach was.

The report is not just a list of problems. It also provides suggestions for fixing the vulnerabilities, such as applying software updates, changing settings, and improving security policies. The report acts as a guide to help the organization improve its IT security and create a safer system.

How Does ioSENTRIX Perform this Phase?

  • Technical Documentation with Proof-of-Concepts (PoCs).
  • Regulatory and Compliance Mapping.
  • Vulnerability Tracker (Excel Format).
  • Continuous Engagement Support.
  • Actionable Recommendations.
  • Business Impact Insights.
  • Executive Summary.

Penetration Testing Methods

Internal Testing

An internal test involves a tester with access to an application behind its firewall acting as a malicious insider. This does not always mean a rogue employee. A common example is an employee whose login details were stolen through a phishing attack.

External Testing

External penetration tests focus on a company's internet-facing assets, such as the website, web applications, email servers, and DNS. The main purpose is to try to access these assets and retrieve important information.

Blind Testing

In a blind test, the tester is only provided with the name of the company being tested. This allows security teams to see how a real attack on the application might happen in real time.

In a double blind test, security staff do not know about the simulated attack beforehand. Similar to real-life situations, they don’t have time to strengthen their security measures before an attempt to breach their system.

Targeted Testing

In this situation, the tester and security team work together and share information about their actions. This is a useful training exercise that gives the security team immediate feedback from the perspective of a hacker.

Choosing ioSENTRIX for Your Penetration Testing

Dealing with the constantly changing world of cybersecurity requires a trusted partner. ioSENTRIX is that dependable partner, providing top-quality penetration testing services and a strong track record of success.

Our team includes experienced security experts, with no beginners. They are dedicated to managing your important security requirements. We customize our approach to fit your specific needs, making sure your security policies and procedures are effective.

Our dedication goes beyond just testing. After the testing, we deliver detailed reports that not only identify vulnerabilities but also provide practical advice to strengthen your security. These reports also serve as helpful learning tools, helping your employees understand and improve cybersecurity awareness within your organization.

With ioSENTRIX, you are choosing more than just the usual options. You are selecting the best. Contact us today to find out how we can help strengthen your business and protect it from cyber threats.

FAQ

What is penetration testing in cybersecurity?

Penetration testing, also known as ethical hacking, simulates real-world attacks to uncover vulnerabilities in IT systems, applications, or networks.

What are the main stages of a penetration test?

The five stages are Reconnaissance, Scanning, Vulnerability Assessment, Exploitation, and Reporting.

How does ioSENTRIX perform penetration testing?

ioSENTRIX combines manual and automated techniques, including business logic testing, to provide actionable insights and remediation guidance.

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