What is a Vulnerability Scan? All You Need to Know (2023)

By Tibor Moes / Updated: June 2023

What is a Vulnerability Scan? All You Need to Know (2023)

What is a Vulnerability Scan?

In the ever-evolving landscape of cybersecurity, vulnerability scanning has become a crucial component in protecting an organization’s digital assets. With the potential for data breaches and cyberattacks on the rise, understanding the importance of vulnerability scanning and how it fits into your security strategy is essential.

So what is a vulnerability scan? Let’s dive into the world of vulnerability scanning and explore its significance, types, tools, and best practices to help you stay ahead of cybersecurity threats.


  • Vulnerability scanning prevents cyber attacks, by identifying flaws or vulnerabilities in computers and networks that could be exploited by attackers.

  • It allows organizations to patch security weaknesses before they are discovered and used to compromise their systems.

  • There are different types of vulnerability scans available, and several best practices to follow, in order to protect your organization’s assets.

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Understanding Vulnerability Scanning

Vulnerability scanning is an indispensable part of an organization’s cybersecurity efforts. It involves using specialized tools to identify and assess potential security weaknesses within an organization’s IT infrastructure, such as network devices, applications, and servers. These tools not only help in detecting known vulnerabilities, but also play a critical role in vulnerability management by providing a clear picture of an organization’s security posture.

Regular vulnerability scanning helps organizations stay on top of potential threats, minimize risk, and protect sensitive data from cybercriminals.

Defining Vulnerability Scanning

Vulnerability scanning is the process of analyzing an organization’s attack surface using specialized tools to detect any security vulnerabilities present in hardware, software, or configurations, as well as policies and procedures. These automated scans give security teams a high-level overview of potential vulnerabilities, enabling them to prioritize and address security weaknesses in a timely manner.

Vulnerability scans can be conducted by the organization’s IT department or outsourced to external security service providers, such as managed security service providers (MSSPs). The ultimate goal of vulnerability scanning is to remediate identified vulnerabilities, thereby reducing the risk of exploitation and improving overall security readiness.

The Purpose of Vulnerability Scans

Vulnerability scans serve as a valuable tool for organizations to protect their systems, data, and reputation. They help in identifying vulnerabilities, including technical flaws in software, hardware, or configurations, as well as vulnerabilities in policies and procedures.

Furthermore, vulnerability scans offer a cost-effective alternative to more in-depth security assessments like penetration testing. A vulnerability scan report typically provides a comprehensive list of vulnerabilities found, along with references for further research and, in some cases, instructions on how to address the issues.

By regularly performing vulnerability scans, organizations can stay proactive in their cybersecurity efforts and minimize the risk of data breaches and other security incidents.

Types of Vulnerability Scans

There are various types of vulnerability scans available, each designed to assess different aspects of an organization’s IT infrastructure. These include network scans, web application scans, and credentialed vs. non-credentialed scans.

Choosing the right type of scan depends on an organization’s specific needs and objectives. By understanding the unique features and purposes of each type of scan, organizations can better align their vulnerability scanning efforts with their overall security goals and enhance their cybersecurity posture.

Network Scans

Network scans are a critical component of an organization’s vulnerability scanning efforts, as they focus on assessing vulnerabilities within the network infrastructure. These scans identify security weaknesses in operating systems, applications, and services running on the network, allowing organizations to prioritize and address vulnerabilities before they can be exploited by cybercriminals.

By conducting regular network vulnerability scans, organizations can stay ahead of potential threats and ensure their networks are secure from both internal and external attacks.

Web Application Scans

Web application scans target websites and web applications to identify security weaknesses, such as SQL injection, cross-site scripting, and other common vulnerabilities. These scans are essential for organizations that rely on web applications for their day-to-day operations, as they help uncover potential security risks that may impact the integrity and availability of their online services.

Regular web application scans can help keep an organization’s web applications secure and safe from potential attackers, protecting both their reputation and their customers’ sensitive data.

Credentialed vs. Non-Credentialed Scans

Credentialed and non-credentialed scans differ in the level of access they require to the target system. Credentialed scans necessitate authentication credentials, allowing for a more detailed view of the system by accessing resources and assets that require privileged access for scanning.

Non-credentialed scans, on the other hand, do not require authentication credentials, resulting in limited visibility into the system. By understanding the advantages and limitations of both types of scans, organizations can determine which approach best suits their security requirements, ensuring a comprehensive assessment of their IT environment.

Vulnerability Scanning Tools and Solutions

When it comes to vulnerability scanning, organizations have a plethora of tools and solutions at their disposal, ranging from open-source options to commercial products. Each tool offers unique features and capabilities, catering to different security requirements and budgets.

By understanding the key differences between open-source and commercial vulnerability scanning tools, organizations can make an informed decision on the best-fit solution for their specific needs, enabling them to effectively protect their digital assets and maintain a strong security posture.

Open-Source Tools

Open-source vulnerability scanning tools, such as OpenVAS and OpenSCAP, provide organizations with a cost-effective option for identifying and assessing potential security weaknesses. These tools are maintained by a community of developers and are often updated regularly, ensuring that they remain effective in detecting new vulnerabilities.

While open-source tools may not offer the same level of support or advanced features as their commercial counterparts, they still provide a solid foundation for organizations looking to implement a vulnerability scanning program without a substantial financial investment.

Commercial Tools

Commercial vulnerability scanning solutions, such as Nessus, Qualys, and Rapid7, offer organizations a more comprehensive and feature-rich option for identifying and addressing security vulnerabilities. These tools typically come with regular updates from the vendor, providing additional security and stability compared to open-source alternatives.

They also offer advanced features, such as real-time scanning and vulnerability classification based on severity, enabling organizations to prioritize and remediate vulnerabilities more effectively.

While commercial solutions may come with a higher price tag, they can provide a greater level of support and functionality, making them a worthwhile investment for organizations with more complex security requirements.

Vulnerability Scanning Process

The vulnerability scanning process involves several key steps, from preparation and execution to reporting and remediation. By understanding and implementing each step effectively, organizations can ensure that their vulnerability scanning efforts are comprehensive and yield actionable insights.

This, in turn, allows them to proactively address any identified security weaknesses and maintain a strong security posture in the face of ever-evolving cyber threats.

Asset Inventory and Prioritization

Before conducting vulnerability scans, it’s crucial for organizations to develop a thorough asset inventory across their entire IT environment. This inventory helps organizations identify and catalog all of their hardware, software, and other resources, providing a clear picture of their attack surface.

By prioritizing assets for scanning based on their criticality and potential impact, organizations can ensure that they are focusing their vulnerability scanning efforts on the most high-risk areas of their infrastructure.

Scan Execution

Scan execution involves using specialized tools to assess an organization’s IT networks, applications, devices, and other systems for potential security vulnerabilities. Depending on the type of scan chosen, such as network, web application, or credentialed vs. non-credentialed scans, different tools and techniques may be employed to identify vulnerabilities.

A successful scan execution not only uncovers potential security weaknesses, but also helps organizations prioritize their remediation efforts based on the severity and potential impact of each vulnerability.

Reporting and Remediation

After conducting a vulnerability scan, the next step is to analyze the scan results and generate a comprehensive report of the identified vulnerabilities. This report typically provides a list of vulnerabilities found, along with references for further research and, in some cases, instructions on how to address the issues.

Once the vulnerabilities have been identified, it’s crucial for organizations to prioritize and address them in a timely manner, ensuring that their systems remain secure and protected against potential exploitation.

Vulnerability Scanning Best Practices

Implementing vulnerability scanning best practices is essential for organizations to maximize the effectiveness of their vulnerability management efforts. By following key guidelines, such as setting up a regular scanning schedule, addressing false positives and negatives, and continuously monitoring and improving their scanning processes, organizations can stay ahead of potential threats and maintain a strong security posture.

Regular Scanning Schedule

Conducting vulnerability scans on a regular basis is crucial for ensuring the ongoing security of an organization’s IT infrastructure. Regular scans help to identify and address new vulnerabilities as they emerge, reducing the risk of exploitation and data breaches.

Organizations should adjust their scanning schedule depending on their specific needs and the frequency with which their IT environment changes. By staying on top of vulnerability scan results and adjusting their scanning schedule as needed, organizations can effectively manage their security risks and maintain a strong security posture.

Addressing False Positives and Negatives

Dealing with false positives and negatives during vulnerability scanning is an important aspect of ensuring accurate and actionable results. False positives are identified vulnerabilities that do not actually exist, while false negatives are vulnerabilities that exist but go undetected by the scanning tool.

To reduce false positives and negatives, organizations can customize the rule set of their scanning tools, add a layer of positive security, and analyze the scan results to identify valid vulnerabilities. By addressing false positives and negatives, organizations can ensure that their vulnerability scanning efforts yield meaningful insights and enable them to take appropriate remediation actions.

Continuous Monitoring and Improvement

Continuous monitoring and improvement is essential for maintaining the effectiveness of an organization’s vulnerability scanning efforts. By regularly monitoring their systems and processes for potential vulnerabilities, organizations can proactively address security weaknesses before they can be exploited by cybercriminals.

In addition to regular vulnerability scanning, organizations should also take steps to improve their security posture by implementing complementary security measures, such as penetration testing and security awareness training. By continuously monitoring and improving their vulnerability scanning processes, organizations can stay one step ahead of potential threats and ensure the ongoing security of their digital assets.

Complementary Security Measures

In addition to vulnerability scanning, organizations can benefit from implementing complementary security measures to further enhance their overall security posture. These additional measures can help organizations address potential vulnerabilities not detected by automated scans.

Educating employees on cybersecurity best practices is also important. This can help organizations identify and address potential vulnerabilities that may not be detected by automated scans. Additionally, educating employees on best practices can help improve the overall effectiveness of their vulnerability management efforts.

Penetration Testing

Penetration testing is a valuable security measure that can be used alongside vulnerability scanning to identify and address vulnerabilities not detected by automated scans. Penetration testing involves simulating a cyber attack against a computer system, with ethical hackers attempting to breach the system’s security using the same methods as an attacker would.

By uncovering vulnerabilities that automated scans may not find, penetration testing helps organizations understand the potential damage of a successful attack and devise plans to reduce risks.

Patch Management

Timely patch management is critical for mitigating identified vulnerabilities and ensuring the ongoing security of an organization’s IT infrastructure. Patch management involves identifying, testing, and deploying patches to systems to fix known vulnerabilities. Regular patch management helps keep systems secure with the latest security patches and software updates, reducing the attack surface and protecting against potential exploits.

By incorporating patch management into their vulnerability management efforts, organizations can effectively address identified vulnerabilities and maintain a strong security posture.

Security Awareness Training

Security awareness training plays a crucial role in educating employees about cybersecurity threats and best practices. By providing staff with the knowledge and skills needed to recognize and respond to potential security risks, organizations can reduce the likelihood of successful cyberattacks and protect their valuable digital assets.

Security awareness training covers topics such as email security, malware recognition, and password security, helping employees stay vigilant and proactive in the face of ever-evolving cyber threats.


In conclusion, vulnerability scanning is a critical component of an organization’s cybersecurity strategy. By understanding the concepts, types, tools, and best practices involved in vulnerability scanning, organizations can effectively identify and address potential security weaknesses in their IT infrastructure. Moreover, by incorporating complementary security measures such as penetration testing, patch management, and security awareness training, organizations can further enhance their overall security posture. With a proactive approach to vulnerability scanning and management, organizations can stay ahead of potential cyber threats and protect their valuable digital assets.

How to stay safe online:

  • Practice Strong Password Hygiene: Use a unique and complex password for each account. A password manager can help generate and store them. In addition, enable two-factor authentication (2FA) whenever available.
  • Invest in Your Safety: Buying the best antivirus for Windows 11 is key for your online security. A high-quality antivirus like Norton, McAfee, or Bitdefender will safeguard your PC from various online threats, including malware, ransomware, and spyware.
  • Be Wary of Phishing Attempts: Be cautious when receiving suspicious communications that ask for personal information. Legitimate businesses will never ask for sensitive details via email or text. Before clicking on any links, ensure the sender's authenticity.
  • Stay Informed. We cover a wide range of cybersecurity topics on our blog. And there are several credible sources offering threat reports and recommendations, such as NIST, CISA, FBI, ENISA, Symantec, Verizon, Cisco, Crowdstrike, and many more.

Happy surfing!

Frequently Asked Questions

Below are the most frequently asked questions.

What is vulnerability scanning and why is IT important?

Vulnerability scanning is a critical part of maintaining IT security. It helps to identify any flaws or vulnerabilities that could be exploited by attackers, allowing organizations to patch them before they are discovered and used to compromise their systems.

Vulnerability scanning is an essential part of staying secure and preventing attacks.

Why would you run vulnerability scans?

Running regular vulnerability scans is an essential part of maintaining the security of your company’s data. Vulnerability scans help identify and address weaknesses in your network that might be exploited by malicious actors, thereby reducing the risk of a successful attack.

Ultimately, taking proactive measures such as these helps protect your data and keep your business safe.

What is a vulnerability scan?

A vulnerability scan is an automated security process that searches a system for potential weaknesses in order to identify security exposures. It works by both creating reports and attempting to actually penetrate the system, giving an accurate picture of any weak points.

Author: Tibor Moes

Author: Tibor Moes

Founder & Chief Editor at SoftwareLab

Tibor is a Dutch engineer and entrepreneur. He has tested security software since 2014.

Over the years, he has tested most of the best antivirus software for Windows, Mac, Android, and iOS, as well as many VPN providers.

He uses Norton to protect his devices, CyberGhost for his privacy, and Dashlane for his passwords.

This website is hosted on a Digital Ocean server via Cloudways and is built with DIVI on WordPress.

You can find him on LinkedIn or contact him here.

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