TL;DR: A well-rounded security program uses nine complementary tests: vulnerability assessments, audits, risk and compromise assessments, penetration tests, red team exercises, bug bounties, social engineering tests, and application security testing. Each produces different evidence, from prioritized CVEs and control gaps to validated attack paths and signs of intrusion. Teams should assign owners, remediate findings, retest fixes, and schedule future testing based on risk, compliance requirements, major system changes, and security maturity.
Cybersecurity testing evaluates systems, controls, applications, and users to identify weaknesses and verify that security measures work as intended. Organizations use different types of cybersecurity testing to find vulnerabilities, measure risk, detect compromise, and validate their ability to prevent and respond to attacks.
NIST SP 800-53 provides a catalog of security and privacy controls organizations can use as part of a broader risk management program. Its companion publication, NIST SP 800-53A, provides procedures for assessing whether those controls are implemented correctly and operating as intended.
Security control assessments are one critical aspect of this process. But unfortunately, there is no one-and-done security testing tool to analyze computer security risks. Each cybersecurity test explores a different aspect of your security posture. The results can help your team prioritize vulnerabilities, strengthen controls, investigate suspicious activity, and verify that remediation efforts worked.
Trying to secure your environment without a clear idea of what’s going on is a lot like trying to paint your house blindfolded. You’re likely to focus too heavily on some areas while completely missing others. Plus, you might not adequately account for Windows.
Vulnerability assessment
Vulnerability assessments are probably the most common cybersecurity evaluation. A vulnerability assessment systematically identifies, analyzes, and prioritizes weaknesses across assets such as endpoints, networks, applications, databases, and cloud infrastructure. Automated scanners typically perform much of the discovery, while security or IT teams validate findings, account for environmental context, and prioritize remediation.
Vulnerability assessment vs. vulnerability management
A vulnerability assessment is a point-in-time process that identifies and prioritizes security weaknesses. Vulnerability management is the continuous program surrounding that assessment, including asset discovery, recurring scans, risk-based prioritization, remediation, exception management, and verification.
Vulnerability scanners may perform network-based, wireless, host-based, database, and application scans. Findings commonly include affected assets, CVE identifiers, available patches, and severity information such as CVSS scores. IT teams can use this data to validate exposure and prioritize remediation based on severity, exploitability, asset importance, and business risk.
Common vulnerability assessment tools include PDQ, Tenable Nessus, Qualys VMDR, Rapid7 InsightVM, and Greenbone OpenVAS. Features and coverage vary, but these tools generally help teams identify affected assets, associate findings with known vulnerabilities, and prioritize remediation.
Cybersecurity audit
This security assessment provides a broad overview of your policies, procedures, and operations to identify potential weaknesses. While the details of the audit depend partially on your industry and organization, auditors may inspect system reports, interview staff, and test your systems. This essentially maps your posture, which you can use to find a path to a more secure environment.
Regulations and industry standards may require periodic evaluations, control testing, vulnerability scans, or formal compliance assessments. The exact requirements vary by framework, organization type, and risk profile. PCI DSS, for example, includes defined assessment and validation requirements for organizations that handle payment-card data.
Risk assessment
A risk assessment evaluates how threats could affect organizational operations, people, data, and mission-critical assets. To do this, you must identify key business objectives and the assets necessary to meet them. Then, weigh the likelihood of each cyber risk, and determine its potential impact. Brainstorming for all the ways things could go wrong may not seem like a fun idea, but security teams can use this information to prioritize cybersecurity risk mitigation efforts. It may also be beneficial for preparing an incident response plan.
According to NIST SP 800-30, risk factors may include cyber threats, vulnerabilities, predisposing conditions, likelihood, and impact.
Compromise assessment
This security test looks at activity, event, and network logs for signs of compromise within your environment. In 2026, companies took an average of 247 days to identify and contain a breach. Unusual network traffic, unexplained account activity, unexpected configuration changes, and other anomalies may indicate that an attacker has accessed the environment. A compromise assessment collects evidence to pinpoint these breaches so you can mitigate damage.
Organizations may conduct compromise assessments periodically, after suspicious activity, before or after a major transaction, or when existing monitoring suggests an attacker may have gained access.
Penetration testing
Penetration tests (also known as pen tests) combine analyst expertise with manual techniques and specialized tools to determine whether vulnerabilities can be exploited and what an attacker could accomplish. While a vulnerability assessment uses automated testing to search for exploitable security weaknesses, an ethical hacker takes a hands-on approach to pen testing to illustrate how a potential threat actor could launch an attack.
There are also different types of penetration testing, including network security testing, web application testing, and more.
Penetration testers may be certified ethical hackers, though certification isn’t essential.
Red team assessment
Sometimes classified as a type of penetration test, red team assessments take attack simulation a step further. A red team assessment is an objective-driven attack simulation designed to test whether an organization can prevent, detect, investigate, and respond to realistic adversary activity. Unlike a conventional penetration test, it may combine technical intrusion, social engineering, physical techniques, lateral movement, and persistence while limiting what defenders know in advance.
This requires significant time and resources. A red team assessment may target the business’s plans, policies, systems, and people to test the organization’s defensive capabilities.
Red team assessments are one of the most advanced methods of simulating a real-world threat, so they tend to be more expensive. Therefore, they’re usually employed by organizations with sophisticated security postures.
Bug bounty
Public bug bounty programs generally focus on explicitly authorized, internet-facing assets. Private programs may grant selected researchers access to additional environments, but participants can test only the systems and techniques included in the program’s scope.
Bug bounty hunters are usually highly skilled professionals who specialize in uncovering flaws, so participating in a bug bounty program is kind of like having an expert team you only pay for results.
While bug bounties can be a convenient way to outsource work, bug hunters can’t test internal systems, and you can’t verify that they assessed the full scope of external assets. Therefore, bug bounties are best used in conjunction with other tests.
Social engineering testing
Social engineering testing assesses your users’ security awareness. Since 62% of breaches involve a human element, your team members may be your greatest cybersecurity strength or your inevitable downfall.
Regular cybersecurity training can prepare staff to recognize social engineering attempts, such as phishing, spear phishing, whaling, vishing, and smishing. However, you won’t necessarily know if the training worked.
Social engineering tests simulate common tactics to see how employees respond, thereby testing both their knowledge and the effectiveness of your training program.
Executives are especially attractive targets because they may have broad access, authority, and visibility into sensitive information. They should be included in testing, but simulations should be designed to improve behavior and controls rather than embarrass individuals.
Application security testing
Application security testing (AST) identifies vulnerabilities in application code, dependencies, configurations, interfaces, and runtime behavior throughout the software development lifecycle. It uses automated tools for more efficient scanning. Catching security issues up front can save time and resources down the road.
Common approaches include static application security testing (SAST), dynamic application security testing (DAST), interactive application security testing (IAST), software composition analysis (SCA), and mobile application security testing. Runtime application self-protection (RASP) is related, but it focuses on detecting and blocking attacks while an application is running rather than testing the application before release.
What should you do after cybersecurity testing?
Cybersecurity testing is useful only when the findings lead to action. Document the results, validate important findings, assign owners and deadlines, complete the appropriate remediation, and repeat the test or assessment to verify that the issue was resolved.
Test result | Typical next step |
|---|---|
Vulnerability assessment finding | Validate the exposure, assign a priority, deploy a patch or mitigation, and scan again |
Audit finding | Create a corrective action plan, assign an owner, and collect evidence when the control is fixed |
Risk assessment result | Select a risk response, such as mitigation, transfer, avoidance, or formal acceptance |
Compromise indicator | Begin incident response, scope the intrusion, contain affected systems, and preserve evidence |
Penetration test finding | Fix the exploited weakness, review related attack paths, and conduct a retest |
Red team observation | Improve prevention, detection, investigation, and response controls |
Bug bounty report | Validate the submission, determine severity, remediate the flaw, and communicate with the researcher |
Social engineering result | Adjust training and controls based on observed employee behavior |
Application security finding | Assign the issue to the development team, fix the code or dependency, and retest it |
How often should you conduct cybersecurity testing?
Testing frequency depends on organizational risk, regulatory obligations, system changes, and available resources. The following examples are general starting points rather than universal requirements.
Test type | Typical cadence or trigger | Common output |
|---|---|---|
Vulnerability assessment | Recurring scans and after significant system changes | Prioritized vulnerability findings |
Cybersecurity audit | Annually or when required by a framework or customer | Control findings and corrective actions |
Risk assessment | Annually and after major business or technology changes | Risk register and treatment priorities |
Compromise assessment | After suspicious activity, before major transactions, or periodically | Evidence of current or historical compromise |
Penetration testing | Annually and after significant application or infrastructure changes | Validated attack paths and remediation guidance |
Red team assessment | Periodically for mature security programs | Findings across prevention, detection, and response |
Bug bounty | Continuously while the program is active | Researcher-submitted vulnerability reports |
Social engineering testing | Periodically and after security awareness training | User behavior and control effectiveness data |
Application security testing | Throughout the development lifecycle | Code, dependency, configuration, and runtime findings |
Cybersecurity testing FAQs
What is a vulnerability assessment, and how do you run one?
A vulnerability assessment identifies, analyzes, and prioritizes security weaknesses across endpoints, networks, applications, databases, and cloud infrastructure. To run one, define the assessment scope, scan the relevant assets, validate the findings, prioritize vulnerabilities based on risk, remediate them, and scan again to confirm the fixes worked.
What cybersecurity tests should IT teams run to find and fix vulnerabilities?
Most IT teams should start with recurring vulnerability assessments and supplement them with risk assessments, penetration tests, cybersecurity audits, and application security testing. The right combination depends on the organization’s systems, risk profile, compliance obligations, and security maturity.
What is the difference between a vulnerability assessment and a penetration test?
A vulnerability assessment uses automated scanning and analysis to identify and prioritize potential weaknesses. A penetration test goes further by attempting to exploit selected vulnerabilities to show how an attacker could gain access, move through the environment, or affect business operations.
How do you assess your security posture before starting a vulnerability management program?
Start by inventorying your assets, running a vulnerability assessment, reviewing existing security controls, and identifying business-critical systems. Use the results to establish a risk baseline, assign remediation priorities, select scanning and patching tools, and define how often your team will reassess the environment.
While security testing is critical, not every business is equipped to perform assessments in house. You may need to hire a third-party information security analyst. Paying for an assessment can seem like a big investment, but it’s a lot more affordable than dealing with the aftermath of a successful attack.
Use cybersecurity testing results to improve controls, prioritize remediation, and verify that fixes worked. Testing should feed an ongoing security program that includes vulnerability management, patch management, monitoring, incident response, and periodic reassessment.
One of the best preventive security measures is updating software regularly. Developers release patches to address vulnerabilities. If you don’t apply those patches, you’re opening yourself up to an IT horror story you could have easily prevented. Plus, the right tools make patch management remarkably easy, so you'll look like a cybersecurity superhero (but without a troubling origin story).
And PDQ is the ultimate superhero sidekick. With vulnerability management, automated deployment, and convenient reporting right at your fingertips, you can gain visibility and take action from one easy-to-use platform. Try it free for 14 days to see for yourself!
