How Often Should You Conduct Penetration Testing?

What is a Penetration Test? 

Penetration testing, or pen testing, is a proactive security assessment that simulates real-world cyberattacks to identify vulnerabilities in an organisation’s IT infrastructure, applications, or networks.  

By mimicking the tactics of malicious hackers, penetration testers expose weaknesses before cybercriminals can exploit them, helping businesses enhance their security defences. 

Pen testing helps companies to identify: 

• Where a hacker might target you 
• How they would attack your systems 
• How your defences would cope 
• The potential impact of a breach 

Organisations rely on penetration testing to: 

• Identify security weaknesses before they are exploited 
• Test and validate the effectiveness of security controls 
• Reduce the security risks of data breaches and cyberattacks 
• Meet compliance requirements such as ISO 27001, GDPR, and PCI DSS 

Types of Penetration Tests 

Penetration testing can be approached using different methodologies, each designed to simulate various levels of knowledge and access an attacker might have: 

Black Box Pen Testing 

This method is the most realistic in mimicking an actual cyberattack. The pen testers have no prior knowledge of the organisation’s infrastructure, forcing them to rely on publicly available information, reconnaissance, and their own expert exploitation techniques to breach defences.  

White Box Pen Testing 

This method provides the testers with full access to the organisation’s IT environment, which can include network architecture, source code, and internal security policies. While this method is less representative of a real world attack, it allows for a very comprehensive security assessment, identifying vulnerabilities that may not be immediately apparent in black box testing. 

Grey Box Pen Testing 

Grey box testing is a hybrid approach, providing testers with partial knowledge of the target systems before the testing begins. This testing method simulates an attack where a hacker has gained limited access to the network, for example through compromised credentials.  

Each of these approaches has benefits, and the choice depends on the organisation’s security objectives, the infrastructure being tested and their penetration testing requirements. At DigitalXRAID, we tailor penetration testing to align with business risks. Whether assessing external threats with black box testing, deep security weaknesses with white box testing, or internal risks with grey box testing, we ensure a robust security evaluation tailored to your needs. 

Similarly to how there are multiple different ways to conduct penetration testing, there are also multiple different pen testing services that can be provided: 

Network Penetration Testing (Internal vs. External) 

There’s a lot of emphasis on external attacks on systems, but the truth is that internal threats to the security of your organisation are just as serious: 

• Internal Pen Testing: With internal pen testing, the ethical hacker simulates an insider threat, assessing security vulnerabilities within an organisation’s internal network. 
• External Pen Testing: With external pen testing, the pen tester evaluates the security of internet-facing systems, such as web servers, firewalls, and VPNs, to identify potential attack vectors. 

Web Application Penetration Testing 

So much of what we do in IT nowadays is through web-based applications, especially those based in the cloud. Web application penetration testing services involve testing for threats, security flaws and vulnerabilities in web applications.  

The application pen tester will assess the security of websites, web applications, and APIs, identifying vulnerabilities such as SQL injection, cross-site scripting (XSS), and authentication flaws. 

Mobile Application Penetration Testing 

With the widespread use of mobile applications, integrating mobile application penetration testing services into your security roadmap is essential. Mobile app pen testing evaluates the security of iOS and Android applications, assessing vulnerabilities in areas such as data storage, authentication, API communications, and encryption methods.  

CREST released a specific accreditation for application security testing, CREST OWASP Verification Standard (OVS), related to both web app and mobile app testing. CREST OVS is a framework, developed by CREST in consultation with the Open Web Application Security Project (OWASP). Accreditation involves a rigorous process including evaluation of service delivery methods and skills and experience. Providers holding this accreditation have met an internationally recognised independent standard for testing.  

Cloud Penetration Testing 

Cloud penetration testing is an authorised, simulated and controlled cyberattack against a system that is hosted on a cloud provider, for example AWS, Microsoft Azure, or Google Cloud Platform, or cloud penetration tests on the configured cloud environment itself.   

Cloud penetration testing is rooted in the shared responsibility model with the cloud service providers. This model defines who is responsible for each of the cloud components, security being one of the most important.   

Wireless Penetration Testing 

Assesses the security of WiFi networks, identifying vulnerabilities such as weak encryption, unauthorised access points, and insecure device configurations. 

Social Engineering Penetration Testing 

Cyber criminals are increasingly turning to sophisticated social engineering attacks because it’s proven to be an effective way to gain access to employee login credentials, personal information and sensitive data. A security breach like this could cause serious financial and reputational damage to your organisation. 

Social engineering tests human vulnerabilities by simulating phishing attacks, pretexting, and other tactics such as newly created deepfakes, to assess employees’ security awareness. 

Red Team Exercises 

A full-scale red team exercise is a simulated attack that combines multiple testing techniques, both digital and physical, aiming to bypass an organisation’s security controls and assess its incident response capabilities. 

Why is Penetration Testing Needed? 

Identify Security Weaknesses Before They Are Exploited 

Cybercriminals are constantly developing new attack techniques. Penetration testing helps businesses stay ahead by uncovering vulnerabilities before attackers can exploit them. 

Ensure Compliance with Regulatory Requirements 

Many industries mandate regular penetration testing to comply with cybersecurity regulations, including: 

• ISO 27001: Requires organisations to test security controls regularly 
• PCI DSS: Mandates annual penetration testing for businesses handling payment card data 
• GDPR: Recommends security assessments to protect personal data 

Improve Overall Security Posture and Risk Management 

By identifying and fixing vulnerabilities in networks, systems and applications, organisations can reduce the risk of financial loss, reputational damage, and operational downtime resulting from successful cyberattacks. 

When is Penentration Testing Needed? 

Businesses should conduct penetration testing at key moments, including: 

• After any major infrastructure change: System upgrades, cloud migrations, and new security controls introduce potential vulnerabilities 
• Before the launch of a new app or product: Ensuring security before deployment prevents costly security breaches 
• After a security incident, especially a data breach: Testing helps identify how an attacker gained access and prevents future incidents 
• To meet compliance and industry regulations: Many regulations require regular testing as part of security best practices 
• As part of a continuous security plan: Regular testing helps businesses maintain a strong security posture against evolving cyber threats 

How Often is Pen Testing Needed? 

Penetration testing is best used in a proactive way, to secure your digital infrastructure. With that in mind, it’s important to conduct regular penetration testing to stay ahead of evolving threats.  

The frequency of penetration testing depends on the organisation’s risk profile, the industry it operates in, and compliance obligations it must adhere to.  

Standard recommendations include: 

Industry Best Practices 

• Annually: The minimum standard for most businesses to address vulnerabilities that a hacker could exploit 
• Bi-Annually: Recommended for industries that handle sensitive customer or financial data 
• Quarterly (or more): This level of frequency is deal for high-risk sectors such as financial services, healthcare, and government. For anything more than a quarterly cadence, vulnerability scanning can be introduced alongside penetration tests 

Learn more about vulnerability assessments vs penetration testing. 

Factors That Affect Testing Frequency 

• Industry and Compliance Requirements: Certain industries, such as banking and e-commerce, have stricter testing mandates 
• Business Risk Profile: Companies with high-value data assets or frequent technology changes require more frequent testing 
• Past Security Incidents: A history of breaches suggests the need for more regular testing 
• Rate of Technology and Infrastructure Changes: Businesses that frequently update applications, networks, and IT environments should conduct testing whenever significant changes occur 

How to Choose a Penetration Testing Provider 

Selecting the right penetration testing provider ensures the quality and reliability of the security assessment. Key factors to consider include: 

• CREST Certified Experts: Choose a provider accredited by CREST or CHECK to ensure industry-leading expertise. At DigitalXRAID, we’re proudly CREST-certified for a number of services 

• Industry Experience and Regulatory Knowledge: Ensure the penetration testing provider understands your industry’s security requirements. Look into the experience that the penetration testing provider you’re considering working with has. Do they have an extensive history of working with companies of all shapes and sizes or those in your industry? 

• Best Practice Methodologies: Examine the methodologies used by your potential provider, such as the OWASP Top 10. Having no methodology in place should be a red flag, as it means the testing provided is likely to be less rigorous than you require 

• Comprehensive Reporting and Remediation Support: Look for providers that offer detailed reports with actionable recommendations and remediation guidance included in the pen testing report 

• Ongoing Security Partnership: Cyber threats evolve constantly. Look for a provider that will act as an extension of your team and offers security assessments and further services to ensure your long-term protection. 

Get Expert Penetration Testing with DigitalXRAID 

DigitalXRAID specialise in providing best-in-class CREST and CHECK-accredited penetration testing services, providing businesses with expert security solutions to mitigate security risks and protect critical assets. We’re trusted by businesses across multiple industries.

• Industry-Leading Expertise: Our highly skilled penetration testers follow the latest methodologies to uncover and remediate security vulnerabilities before attackers can exploit them 
• Advanced Reporting: We go beyond CVE ratings in your pen testing report, by providing a tailored business risk score according to your business and industry, ensuring clear and actionable insights for both technical and executive stakeholders 
• OrbitalX Security Portal: Gain full visibility into your cyber security posture with features like live vulnerability dashboards, streamlined reporting, and issue remediation tracking 
• Government-Grade Security Standards: Our services are trusted by national security agencies, providing assurance of the highest security standards 
• Tailored Security Solutions: Whether you need penetration testing, vulnerability assessments, or compliance services, we adapt to your specific business needs 

Guided by our Customer First value, we’re committed to delivering managed security solutions that not only address your immediate security needs but also support your long-term success. 

Let DigitalXRAID help you protect your organisation with cutting-edge penetration testing services. 

Contact us to speak to an expert today, and safeguard your business against emerging cyber threats.