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Cybersecurity 101/Cybersecurity/Types of Security Audits

6 Types of Security Audits

Knowing about the different types of security audits can help you improve your organization's security posture. Learn how they work and where and when to apply them.

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Author: SentinelOne
Updated: May 19, 2025

Universities and colleges are instructed to conduct third-party security audits on their premises. Outsiders come and go daily, and they should be tracked to check for unauthorized access rights. They shouldn’t, enter the campus without prior permissions. Institutions must strive to avoid multiple entries. In Blockchain, transactions consist of messages exchanged between contracts across multiple ledgers.

One of the most common disasters is the partial execution of these transactions, where tokens are debated. Enterprises thrive on improving their speed, scalability, and reliability while continuing to drive innovation. Protecting sensitive data on the cloud or IT isn’t a one-time setup process. It requires vigilance, adaptability, and proactive security and is an iterative workflow.

As cybercriminals are constantly evolving tactics, what seems like the best security measure today may be compromised tomorrow. These Types of security audits are essential for conducting detailed evaluations of your infrastructures, policies, and controls. Let’s explore the different types of security audits below.

Types of Security Audits - Featured Image | SentinelOne

What are Security Audits?

A cloud security audit is like a blueprint that guides your organization in protecting sensitive data, users, and assets.

We can break down the different types of security audits into various key components. They are as follows:

  • Vendor Selection: Your security solution is essential, but the vendor responsible for delivering these services also takes priority. Service delivery is a crucial step for vendors in vending. You must perform independent risk evaluations and receive continuous insights into their best practices and compliance standards. If they have low scores, these metrics will inform your decisions on continuing your partnership or association with them. You can always switch to another vendor if they don’t satisfy your requirements or fall out of compliance.
  • Attack Surface Management: As your organization scales up and evolves, it will have more attack surfaces every year. It is growing and must deal with additional networks, endpoints, users, services, and other components. Any outdated software, lack of patching, misconfigurations, and other unforeseen vulnerabilities can jeopardize your organization’s safety. Analyzing and tracking your attack surfaces is a shared responsibility that ensures better risk management in the long term.
  • Improving Access Management: Weak access controls are one of the biggest real causes of breaches. Your organization should implement role-based access controls and multi-factor authentication across all accounts and devices to enhance security. You should also regularly review your user permissions and activity logs. 
  • Secure Sharing Policies: The cloud is a global hub for collaboration. However, despite its innovation and efficiency, it also puts your users at risk of accidental data exposure. Strong data loss prevention policies and sharing protocols are essential to ensure users’ continued safety and eliminate risky actions. Secure sharing policies can also help you quarantine sensitive files, back up data, and address other security issues. They can also help you keep your device safe and within authorized boundaries. One of the best examples of what happens when you neglect access management in security audits is the classic case of the Colonial Pipeline breach.

Importance of Security Audits

Security audits give you a complete, holistic view of your cloud infrastructure. It can ensure alignment with established security standards, controls, and regulatory frameworks. These are required because they instill confidence in your customers and stakeholders about your organization’s security capabilities. They can also help map vulnerabilities and identify critical threats early on.

Security audits can simplify software management and delivery, reduce ecosystem complexities, minimize risks, and streamline identity. They can also ensure compliance and strict privacy controls.

6 Types of Security Audits

Security audits should be conducted at least twice a year or more. It depends on the size of your organization and which industry domain you operate in. You can automate some aspects of your security audits. Still, certain things, such as time-consuming penetration testing, require careful attention and manual intervention at least bi-annually. Combining automated and manual pen testing can yield good results.

By running vulnerability scans regularly, you can uncover every single problem. Your goal should be to enforce shift-left security and integrate it with your CI/CD pipeline. There are various security audit types to be aware of.

They are as follows:

1. Compliance Audits

A cybersecurity audit for compliance reveals your organization’s compliance status by comparing it to the latest regulatory frameworks. Popular industry regulatory frameworks global organizations are – PCI-DSS, ISO 27001, HIPAA, NIST, CIS benchmark, and others. Compliance audits can spell doom for your company.

A lack of compliance can cause customers to lose trust and tarnish your business’s reputation. So compliance audits should be an invaluable part of your security management and reviews.

2. Vulnerability Assessments

Out of the many types of security audits, these are straightforward assessments that identify and quantify critical vulnerabilities. You can also spot vulnerabilities in your infrastructures, systems, and networks. Conduct your vulnerability assessments using automated scanning solutions. You should also manually review the results of these tests. The main objective of vulnerability assessments is to identify areas for improvement and take steps to strengthen your organization’s overall security posture. You can use a mix of agent-based and agentless vulnerability assessments, but it is up to you.

3. Penetration Testing

Penetration testing involves simulating real-world attacks on your infrastructure and probing it to scope for critical vulnerabilities. When you approach your organization from the mindset of an attacker, you can discover how your assets and users can be manipulated. Penetration testing is more than just hijacking the technology. It uses social engineering techniques and emotional baits to emulate hacker behavior and identify potential security risks.

Based on the results of these tests, you can assess the organization’s ability to respond to and defend against various attacks. And since these are offensive simulations, you know you can recover from these breaches. However, in the real world, there is no reset button, so it is essential to cover all angles and conduct thorough penetration tests.

4. Risk Assessment Audits

Your organization deals with uncertainty. It faces known and unknown risks daily. Creating a risk profile—what your organization can handle and cannot—is important. It is essential to map out potential risks that arise from vulnerabilities and systems, but some risks can stem from insider threats.

These risks don’t act for years and stay dormant, so you need a combination of manual and automated methods to conduct your risk assessments. You may need multiple evaluations and then assign a risk score accordingly. Your social engineering audit will be a part of this, assessing your company’s vulnerability to real-world attacks like pretexting and phishing. You will find gaps in your organization’s security awareness training and receive tailored suggestions for improving them.

5. Internal Security Audits

Internal security audits are conducted by the organization’s security awareness training. Your in-house security team conducts it, and your employees do it. It evaluates how your internal controls, processes, and policies work. You can run verification tests and compare them with industry laws and standards.

Internal audits should be conducted frequently to identify areas for improvement and development. They can guarantee the security of your company’s sensitive assets. For internal audits, your employees will need access to sensitive credentials, application authorization rights, and the ability to scan your systems, apps, and networks.

6. External Security Audits

External audits are conducted by third parties or outsiders who may not belong to the company. They will independently assess your brand’s internal controls, transaction statements, and compliance with the latest industry norms and standards. External audits are more expensive and less frequent than internal audits, but they provide an outsider’s perspective, which is why they can be invaluable. Your external auditor will conduct independent investigations and research to ensure your organization complies with the latest standards.

External auditors don’t require internal access, but they may request access to your credentials to map assets for specific scans. They can help identify vulnerabilities exposed to the Internet. External auditing involves a mix of web application scanning, exploitation testing, fuzzing, port scanning, network scans, and DNS enumeration. External security audits can help thwart public threats and strengthen your security posture.

Steps for Conducting a Security Audit

A security audit requires meticulous planning, strict verification, and close follow-up to strengthen your firm’s security posture.

Take these steps for conducting different types of security audits for your organization:

  • Define Your Scope: Determine what you will audit, such as applications, networks, cloud infrastructure, compliance frameworks, or a subset thereof. Well-defined objectives and scopes keep you on target and efficient.
  • Assemble the Right Team: Security audits sometimes require various skills, from compliance to penetration testing. You may need in-house experts and occasionally external auditors to gain an objective perspective.
  • Gather Documentation: Collect network maps, infrastructure details, compliance policies, and prior audit reports. These details will help your team map vulnerabilities, attack surfaces, and compliance gaps.
  • Asset Identification and Classification: Create a comprehensive inventory of hardware, software, databases, and end-user devices—label assets by sensitivity and criticality to help you assign the appropriate resources to safeguard them.
  • Perform Vulnerability Scans: To find potential vulnerabilities, execute automatic scanners or other preferred scanners. Include manual checks to validate results and remove false positives.
  • Execute Penetration Tests: Perform simulated attacks to observe your systems’ responses. This will reveal human and technical vulnerabilities, including social engineering threats.
  • Evaluate Compliance: Ensure you follow the relevant frameworks such as ISO 27001, PCI DSS, or HIPAA. Determine where you are short and correct on time. Review Results and Rank Risks Collect your findings into a risk register and assign risk ratings. Set priorities for the most serious issues, but do not forget less pressing threats that might occur in the future. Remediate and Review Make the fixes, update the policies, and schedule regular reviews. Security isn’t a once-and-done kind of thing—it’s a continuous process that develops as your business grows.

Conclusion

Security audits are not just checklists masquerading as security—they’re proactive measures that harmonize technology, people, and processes with one security vision. By consistently refining your audits, you’re one step ahead of changing threats and minimizing the danger of expensive breaches.

You keep everyone involved, from executive boards to frontline employees, up to speed on what they must do to maintain reasonable security practices. Planning regular testing, reviewing, and refreshing your defenses fosters a culture of resiliency, and your business can innovate freely without putting itself at unnecessary risk.

Finally, a well-crafted security audit is the foundation for improved compliance, secure cloud usage, and effective risk mitigation processes. It’s an essential pillar of any forward-thinking cybersecurity strategy.

FAQs

Security auditing formally reviews an organization’s IT infrastructure, policies, and controls to identify vulnerabilities and compliance issues. It typically involves checking configurations, permissions, incident logs, and scanning for known threats. A security audit considers technical and procedural controls to provide actionable recommendations that strengthen a business or institution’s overall cybersecurity position.

Security audits are usually conducted at least every two years but can be performed more often due to industry standards, emerging threats, and significant infrastructure updates. Regular audits facilitate compliance, uncover new risks, and ensure the success of mitigation methods. Ultimately, aligning your audit cycles with your firm’s specific risk environment and work life is essential to critical cybersecurity.

Yes. Small and medium-sized enterprises are prime targets for cybercriminals simply because they are supposed to have weaker security controls. Security audits reveal undetected undetected vulnerabilities in processes, applications, and networks. They also help companies comply with industry standards and regulations. Even a low-scope audit can significantly minimize the likelihood of breaches, protect valuable data, and foster confidence among customers and partners.

Internal audits are conducted by on-site staff sufficiently familiar with the company’s infrastructure and policies. They are more frequent and have rapid remediation-driven feedback. External audits are conducted by third-party specialists with objective viewpoints and specialized expertise. While generally less frequent, external audits also offer objective assurance of security posture and compliance with industry standards in general.

A compliance audit is necessary whenever organizations adhere to legal, regulatory, or industry standards like PCI DSS, HIPAA, or ISO 27001. Fundamental structural changes, such as introducing new cloud services or acquiring another organization, can trigger compliance checks. Regular compliance audits protect organizations from fines and reputational damage and enforce best practices for security management.

Rank findings first by severity and potential impact. Repair the most severe vulnerabilities immediately, but plan to repair medium—and low-severity ones. Apply technical fixes such as patching or configuration changes and revise associated policies. Document what is done and verify effectiveness with periodic reviews or mini-audits. Repeat remediation and re-scan to maintain a good, responsive security posture.

Penetration testing is unnecessary in every audit, but it’s strongly advised for most. Some frameworks mainly consist of compliance checks and vulnerability scans. Penetration testing, which simulates hacker techniques, gives you a more in-depth, hands-on evaluation of your defenses. It can also find human mistakes and social engineering vulnerabilities. As part of your audit plan, penetration testing introduces an excellent level of forward-looking security assurance.

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