Software security audit: Objectives, types and best practices

Software applications today operate in complex and interconnected environments. From cloud workloads and SaaS platforms to mobile applications and APIs, software is constantly exchanging data and interacting with users, services, and third-party components.

This expanding attack surface makes security failures more likely if organizations do not continuously evaluate and improve the security posture of their software. A single overlooked flaw or misconfiguration can lead to data breaches, fraud, financial losses, downtime, and reputational impact.

A software security audit helps prevent these risks by systematically assessing the security controls, code integrity, configurations, and operational readiness of applications.

Comprehensive software security audits are no longer optional for modern businesses.

Organizations are expected to demonstrate strong security governance and align with compliance frameworks.

Security audits provide the necessary assurance and visibility to maintain trust, reduce vulnerabilities early, and strengthen resilience throughout the software development lifecycle. In a world where delivery velocity is increasing and systems are more distributed, a structured, repeatable approach to evaluating software security is essential.

What is a software security audit?

A software security audit is a systematic evaluation of an application’s security posture that examines code, configurations, dependencies, infrastructure, and operational processes to identify vulnerabilities and weaknesses.

Unlike general vulnerability scanning, a software security audit is more comprehensive and methodical, often combining automated analysis with manual validation. The goal is to assess how well software withstands real-world threats and meets internal and regulatory security standards.

What is the purpose of a software security audit?

The primary objectives of a software security audit are to evaluate risk and improve resilience. A brief explanation followed by key purposes:

A well-structured software security audit helps organizations understand how secure their applications truly are, identify gaps in controls, and prevent costly breaches. It serves as both a diagnostic and strategic improvement process.

• Identify and mitigate security risks before attackers exploit them

• Validate compliance with regulatory and industry standards

• Discover vulnerabilities in software components, code, and infrastructure

• Assess overall security posture and maturity

• Demonstrate trust and assurance to customers and stakeholders

• Reduce long-term costs associated with incident response and data breaches

What are the different types of software security audits?

Software security audits come in several forms, each focusing on different parts of the software environment. No single audit type is sufficient on its own, which is why organizations often use a combination of approaches to gain a full understanding of security readiness. Some audits examine code quality and design, others assess real-world attack exposure, and some validate compliance and governance.

For a deeper breakdown of tools that support these audit types, refer to our detailed guide on top software security audit tools.

Below are the primary categories of software security audits used in modern development and deployment environments.

Code review (static analysis)

This audit type reviews the application’s source code without executing it. Static Application Security Testing (SAST) tools and manual code inspection help identify insecure coding practices, logic flaws, insufficient input validation, weak cryptography, and other vulnerabilities. Code review is most effective early in development, enabling development teams to fix issues before they propagate into production environments.

Configuration and infrastructure review

Applications operate within networks, servers, cloud environments, and containerized platforms. A configuration audit evaluates these surrounding components to ensure they are securely configured. Common findings include overly permissive IAM roles, open TCP ports, publicly exposed storage buckets, and weak SSL configurations. This audit type is critical for cloud-native environments where configuration errors frequently lead to security incidents.

Penetration testing (dynamic analysis)

Penetration testing examines how the running application behaves against real-world attack techniques. Instead of reviewing code, testers interact with the live environment to exploit security weaknesses, privilege escalation paths, authentication errors, and business logic flaws. Penetration testing provides insight into how attackers might compromise the application and what impacts such exploitation could have.

Dependency and library audit

Modern software heavily relies on open-source libraries and third-party packages. Software Composition Analysis (SCA) tools examine these dependencies to identify known CVEs, outdated libraries, and supply chain risks. A dependency audit helps prevent attackers from exploiting publicly documented vulnerabilities buried inside layers of library dependencies.

Compliance and policy audit

Compliance audits verify whether application security controls align with regulatory standards such as SOC 2, ISO 27001, PCI DSS, and HIPAA, along with internal governance policies. These audits involve reviewing documentation, access controls, encryption standards, change management processes, and incident response procedures to ensure the organization can produce required audit artifacts when needed.

Software security audit checklist

A software security audit is most effective when structured and clearly scoped. The checklist below provides a framework that organizations can use to stay organized throughout the audit lifecycle.

Before the checklist, it is important to understand that the audit process benefits greatly from clear objectives, collaboration between development and security teams, and consistent documentation practices.

Pre-audit preparation:

• Define scope and objectives

• Identify critical assets and data flow paths

• Select appropriate audit types based on application architecture

• Gather relevant documentation and environment details

• Establish timeline and stakeholder responsibilities

During audit:

• Execute code scanning and review procedures

• Assess application configurations and infrastructure components

• Conduct penetration testing activities on the running environment

• Review operational processes and security documentation

• Interview key technical and security personnel

Post-audit actions:

• Prioritize identified vulnerabilities using CVSS or similar scoring systems

• Develop a remediation and mitigation roadmap

• Determine which risks require acceptance vs elimination

• Communicate findings to both technical and non-technical stakeholders

• Schedule retests to verify effective remediation

Ongoing maintenance:

• Implement continuous monitoring and security testing practices

• Establish regular audit cycles based on system updates and risk levels

• Reassess scope as application features evolve

• Track progress through centralized reporting and dashboards

Best practices for software security audit

This section expands on how organizations can plan, execute, and integrate security audits into ongoing workflows.

Planning and scoping

• Establish clear goals that define what success looks like

• Bring together security teams, developers, and business leadership early

• Choose audit types based on technology stack and maturity level

• Allocate realistic timelines and ensure stakeholders have availability

Execution excellence

• Combine automated scanning with manual testing for accuracy

• Test in environments that mirror production as closely as possible

• Keep detailed documentation of all findings and decisions

• Maintain traceability of evidence and verification steps

• Communicate status updates throughout the process to reduce surprises

Vendor selection (if outsourcing)

• Verify analyst certifications and specialization experience

• Ensure transparency in methodology and reporting structure

• Request sample reports to evaluate depth and clarity

• Confirm availability of remediation assistance and retesting

Integration with development

• Adopt a shift-left security mindset to catch issues earlier

• Integrate automated testing into CI/CD pipelines

• Provide developers with security education and feedback loops

• Adapt policies to support both security and delivery speed

Reporting and communication

• Prepare an executive summary tailored to business leadership

• Include actionable steps and technical detail for development teams

• Map findings to compliance frameworks where applicable

• Use dashboards or reporting tools to track remediation over time

Final thoughts

A software security audit is more than a compliance requirement. It is a strategic investment in the long-term reliability and trustworthiness of the applications that power your business.

Security risks evolve continuously, and new features, integrations, and code changes can introduce vulnerabilities unexpectedly.

This means that even software that was secure at one point in time can become exposed if security practices are not maintained. Regular audits help ensure that security controls are adapting in step with development progress and environmental changes.

Organizations benefit most when audits are embedded into the development lifecycle rather than treated as isolated checkpoints.

By integrating continuous security testing and adopting a shift-left approach, teams can identify weaknesses earlier when they are faster and less expensive to fix. This also helps reduce friction between development and security teams by making risk awareness part of everyday workflows.

Prioritizing software security audits demonstrates accountability to customers, partners, and regulatory bodies while reducing the likelihood of expensive security incidents.

When supported by strong documentation, clear communication, and proactive remediation, audit processes contribute directly to improved resilience and operational confidence.

Building a culture where security is considered foundational rather than optional is ultimately the most effective way to sustain secure software over time.

FAQ

How often should you conduct a software security audit?

At a minimum, software security audits should be performed annually, but high-risk applications, regulatory environments, or major system changes may require more frequent auditing.

What is the timeline and cost for a software security audit?

The duration and cost vary based on application complexity, audit scope, and whether third-party specialists are involved. Complex systems may take several weeks and require larger budgets, while smaller applications can be audited more quickly.

Written by

Febna V M

Cyber Security Engineer

Contributor

Aaron Thomas

Product Marketing Specialist