Cybersecurity weaknesses can exist in applications, cloud infrastructure, APIs, authentication systems, configurations, and business processes. Attackers only need to find one exploitable weakness to begin an attack.
Businesses can reduce this risk by actively looking for vulnerabilities before malicious actors discover them. A proactive security strategy combines vulnerability assessments, penetration testing, application testing, cloud security testing, and continuous monitoring.
The goal is not simply to find more vulnerabilities. It is to identify meaningful weaknesses, understand their potential impact, and fix them before they become an entry point for attackers.
Start With a Vulnerability Assessment
One of the first steps businesses can take is to identify known vulnerabilities across their environment.
A vulnerability assessment can help organizations discover weaknesses in systems, applications, infrastructure, configurations, and exposed services.
The results can then be categorized and prioritized based on factors such as severity, exposure, exploitability, and business impact.
However, vulnerability assessment should not be the only layer of security testing. Automated tools can identify many known weaknesses, but they may not fully understand application logic or how multiple vulnerabilities can be combined.
Use Penetration Testing to Validate Risk
Penetration testing takes security testing further by attempting to validate whether identified weaknesses can actually be exploited.
Testers examine systems from an attacker's perspective, investigate potential entry points, test security controls, and analyze how vulnerabilities could affect the organization.
A penetration testing guide provides additional information about how this process works.
The value of penetration testing is that it can help businesses distinguish between vulnerabilities that merely exist and weaknesses that could realistically lead to unauthorized access or other security impact.
Test Web Applications
Web applications often contain sensitive information and business-critical functionality, making them an important part of a proactive security strategy.
Web application penetration testing can examine authentication, authorization, session management, APIs, input handling, business logic, and other application components.
Manual testing is particularly useful for identifying issues that depend on how different application functions interact.
Test Mobile Applications
Mobile applications can introduce additional security considerations.
A mobile application may communicate with APIs, process sensitive information, store data locally, and interact with authentication systems.
Mobile application penetration testing can help identify vulnerabilities involving authentication, authorization, data exposure, APIs, insecure storage, and communication between components.
Testing both the mobile application and its supporting backend services can provide a more complete view of potential security weaknesses.
Assess Cloud Infrastructure
Cloud environments can change quickly as businesses add services, modify configurations, and deploy new resources.
Cloud penetration testing can help organizations identify weaknesses involving exposed services, access controls, identity permissions, cloud configurations, storage, and interactions between cloud resources.
Regular cloud security testing can help businesses identify problems that may appear after infrastructure changes.
Look for Attack Paths
Attackers do not necessarily exploit one vulnerability at a time.
Several lower-severity weaknesses may potentially be combined into a more significant attack path. For example, an information disclosure issue might reveal information about an internal service, while an authorization weakness could provide access to restricted functionality.
Penetration testers can investigate whether vulnerabilities can be chained together and what an attacker could potentially accomplish.
This gives businesses a better understanding of real-world risk than reviewing vulnerabilities individually.
Test After Major Changes
Security testing should keep pace with changes to the business environment.
New applications, major software releases, cloud migrations, infrastructure changes, new APIs, and third-party integrations can all introduce new security risks.
Organizations should consider targeted security testing after significant changes rather than assuming that an earlier assessment remains valid indefinitely.
The appropriate schedule depends on the organization's risk profile and how quickly its technology changes.
Make Security Testing Continuous
Businesses with rapidly changing environments may benefit from ongoing security validation.
Continuous penetration testing helps organizations maintain security testing across an agreed scope rather than relying entirely on isolated assessments.
Continuous testing can be particularly useful for organizations that frequently release new features, modify infrastructure, or operate large and dynamic attack surfaces.
Prioritize What Needs to Be Fixed
Discovering vulnerabilities is only useful if businesses can act on the findings.
Security teams should prioritize vulnerabilities based on factors such as:
Exploitability
Internet exposure
Business impact
Sensitive data involved
Privilege level
Availability of compensating controls
Whether the vulnerability can be combined with other weaknesses
This approach helps organizations focus limited remediation resources on the issues that matter most.
Retest After Fixes
Remediation should be followed by verification.
After a vulnerability has been fixed, security teams should confirm that the original issue is no longer exploitable. Retesting can also reveal whether the fix was incomplete or introduced another security problem.
This creates a continuous cycle:
Discover → Validate → Prioritize → Remediate → Retest → Monitor
Repeating this process helps organizations keep their security posture aligned with changes in their technology environment.
Choose the Right Testing Approach
Different businesses have different security requirements. A small organization with a relatively stable environment may have different testing needs from a SaaS company deploying new code every week.
Businesses should consider their applications, infrastructure, attack surface, data sensitivity, regulatory requirements, and rate of change when developing a security testing strategy.
They can also review how often businesses should perform penetration testing when establishing an appropriate testing schedule.
Consider the Cost of Proactive Testing
Security testing requires investment, but the cost depends on factors such as scope, infrastructure size, application complexity, testing depth, and frequency.
Businesses can review penetration testing costs when planning an engagement.
Smaller organizations can also consider how security testing fits within their broader cybersecurity budget. This guide on how much a small business should spend on cybersecurity provides additional context.
The objective should be to build a sustainable testing program rather than treating security testing as an occasional expense.
Choose an Experienced Testing Provider
The effectiveness of a penetration test depends partly on the quality of the testing team and methodology.
Businesses should evaluate a provider's technical expertise, testing methodology, scope, reporting, remediation guidance, and retesting process.
This guide on how to choose a penetration testing company provides useful factors to consider when evaluating providers.
Build a Proactive Security Cycle
Businesses cannot guarantee that attackers will never discover a vulnerability. They can, however, make it harder for attackers to find weaknesses before their own security teams do.
A proactive approach combines vulnerability assessments with manual penetration testing, application and cloud testing, continuous validation, remediation, and retesting.
The most important step is to make security testing an ongoing process. As applications, infrastructure, and attack surfaces change, businesses should continue looking for weaknesses and addressing them before they become opportunities for attackers.
