The benefits of third-party penetration testing assessments


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With technology embedded in every aspect of modern business operations and the sharp increase in cyber-attacks in recent years, maintaining a robust IT security posture isn’t just a luxury – it’s necessary for business continuity. No longer is it adequate to merely react to security threats; organizations must stay ahead, anticipating potential vulnerabilities and addressing risks proactively.

This introduces us to penetration testing – a critical component of cybersecurity assurance. While many organizations have robust internal security teams, the question arises: is it sufficient to rely solely on them? This brings us to the topic of third-party penetration testing and why it might be the missing piece in your cybersecurity strategy.

What is third-party penetration testing?

At its core, penetration testing, often abbreviated as ‘pentesting’, is the simulated cyberattack on a system, network, or application, aiming to uncover vulnerabilities that could be exploited by malicious entities. While internal teams are often capable of conducting these tests, there’s an increasing recognition of the value of third-party penetration testers.

So, what differentiates a third-party penetration test from its other counterparts? Simply put, it’s by engaging an external entity specializing in performing penetration test assessments. These external experts have no inherent bias or preconceived notions about your systems. They approach your platforms, applications and infrastructure as an outsider with little to no knowledge of internal systems and processes, much like an actual attacker would. This outsider’s perspective can be, in many cases, the difference between identifying a critical vulnerability and overlooking it.

Unlike internal teams that have a multi-faceted role within the organization, when you hire these third-parties they are solely focused on one thing: finding and reporting security vulnerabilities. With a repertoire of specialized tools, techniques and experience spanning across different industries and systems, they often bring a depth of expertise that’s hard to match.

Why can’t internal teams always handle penetration tests?

For many organizations, the internal security team is the first line of defense against cyber threats. They set up firewalls, monitor network traffic for attacks, enforce company-wide security policies, etc. Some might even regularly conduct penetration tests. But is this always enough? Let’s delve into the complexities and limitations these teams might face and understand the growing need for external penetration testing:

  • Familiarity bias: One of the most subtle challenges is the inherent familiarity bias. Being deeply intertwined with the company’s systems and networks, an internal security team might unintentionally overlook certain vulnerabilities. They see the systems every day, understand their architecture, and are familiar with the rationale behind certain configurations. This intimacy can be useful to find the most subtle security vulnerabilities, but paradoxically, it can sometimes obscure the view of potential weaknesses. On the other hand, an external penetration testing company approaches systems without this pre-existing knowledge, occasionally spotting what internal teams might miss due to the biased view.
  • Regulatory constraints: Some industries, jurisdictions, and compliance frameworks have strict guidelines that mandate security assessments, including penetration tests, to be performed by an independent third party. This ensures unbiased scrutiny and avoids potential conflicts of interest. Relying solely on an internal team in such scenarios could lead to non-compliance with these requirements, sometimes even regulatory issues.
  • Time limitations: In the hustle and bustle of daily operations, internal teams often juggle multiple tasks. While they might want to devote more time to vulnerability assessments, pressing issues like immediate threats, advising internal stakeholders on security matters, liaising with developers, etc., might divert their focus. Third-party penetration testing services, however, are dedicated to one task: to perform technical security evaluations.
  • Lack of diverse experience: An internal security team, no matter how competent, is often restricted by the company’s own technologies and systems. In contrast, external penetration testers from a reputable pen testing services provider have exposure to various companies in different industries, which leads to a diverse set of infrastructures, technologies, and threat profiles. This diversity equips them with unique insights that can be invaluable during a security assessment.

While internal teams play an irreplaceable role in an organization’s cybersecurity framework, intrinsic limitations exist when they’re the sole entity tasked with pen testing. Bringing in third-party penetration test experts can complement the efforts of internal teams, ensuring a holistic and robust security stance.

What are the benefits of hiring an external penetration testing service?

External penetration testing services offer a distinct set of advantages that complement the efforts of internal security teams. These benefits are about identifying vulnerabilities and providing comprehensive insights, ensuring compliance, and promoting a proactive security culture.

  • A fresh perspective on risks and vulnerabilities: Third-party penetration testing teams bring an outsider’s viewpoint to your systems and applications. External penetration testers have no inherent bias or prior knowledge about your infrastructure, and this fact allows them to see vulnerabilities and potential attack vectors that internal teams might overlook.
  • Access to specialized tools and techniques: Certain penetration testing companies invest in the latest tools and methodologies specific to security testing, especially those providers that focus on red team assessments; this ensures that the testing is comprehensive and aligns with current threat landscapes.
  • Regulatory and compliance benefits: Many industries have regulatory requirements mandating periodic security assessments by third-party providers. By hiring external penetration testers, organizations can ensure they meet these mandates, providing an unbiased report that satisfies auditors and stakeholders.
  • Continuous learning for internal teams: While third-party penetration tests focus on identifying vulnerabilities, they also serve as learning opportunities. Internal security teams can work alongside these external experts, gaining insights into new techniques, tools, and practices. This collaborative approach fosters skill development and knowledge sharing.
  • Comprehensive reporting: Solid external penetration testing companies’ reporting capability is a notable strength. Post-assessment, they provide detailed reports outlining vulnerabilities, potential impacts, and recommended remediation strategies. These reports can be invaluable for internal teams, helping them prioritize and address security concerns.

In summary, external penetration testing services offer a robust and comprehensive approach to security assessment. They fill gaps, provide specialized expertise, and promote a more thorough understanding of potential threats and vulnerabilities.

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When is third-party penetration testing a requirement?

While third-party penetration testing offers many benefits, there are instances where seeking the expertise of external penetration testers is not just advisable but mandatory. These scenarios underscore the critical importance of having an independent and unbiased security assessment to ensure the utmost protection and compliance. Here’s when third-party penetration testing becomes a must:

  • Compliance requirements: Various industry standards and regulations mandate organizations to undergo external security assessments. For instance, SOC 2, ISO 27001, PCI DSS, GLBA and many others that either mandate (or suggest) that a pentest should be conducted.
  • Investments, Mergers and Acquisitions (M&A): When organizations plan to merge with or acquire another company, understanding the target’s cybersecurity posture as part of the due diligence process is paramount. In such scenarios, a third-party penetration test ensures an objective assessment, highlighting potential risks associated with the integration.
  • Vendor security assessments: Organizations must ensure these additions don’t introduce vulnerabilities before integrating third-party services or technologies into their infrastructure. An external penetration testing service can vet these vendors, ensuring they meet the required security standards.
  • Post-security incident: After a cybersecurity breach or significant incident, it’s crucial to understand the full scope of the vulnerability. Third-party penetration testers can objectively evaluate the incident, identifying the cause, impact, and potential vulnerabilities.
  • Large-scale system overhauls: The risk profile can shift dramatically when organizations undergo significant system upgrades or architectural changes. In such cases, an external security assessment ensures that new vulnerabilities haven’t been introduced.

In essence, third-party penetration testing becomes necessary in scenarios that demand an objective, comprehensive, and specialized security evaluation. Ensuring compliance, vetting potential partnerships and acquisitions, or reassessing post-incident are just some situations where external security experts’ insights are beneficial and of the utmost importance.


Third-party penetration testing benefits and liitations

Choosing the right third-party penetration testing service provider

Selecting a third-party penetration testing provider is a decision of paramount importance. This choice can shape your organization’s cybersecurity landscape, influencing how effectively vulnerabilities are identified and addressed. An optimal selection ensures a thorough and efficient penetration testing process, while a hasty choice may result in overlooked threats or inefficient practices. Here’s a guide to making an informed decision:

  • Expertise and credentials: When you’re looking to conduct penetration testing, the technical proficiency of the penetration testing provider is vital. Check for professionals holding recognized certifications such as OffSec Certified Professional (OSCP), CREST CRT and CREST CCT, or pentest certifications by SANS.
  • Client testimonials and case studies: Reputation and a track record matter. Review testimonials and case studies and, if possible, request references. Understanding a provider’s previous engagements can give insights into their effectiveness and professionalism during the penetration testing process.
  • Tailored approach: Every organization has unique systems, technologies, and vulnerabilities. An efficient penetration testing provider will not take a generic approach but will customize their manual penetration testing based on the intricacies of your infrastructure.
  • Communication and collaboration: The success of the penetration testing process often hinges on communication. Opt for a service emphasizing collaboration, ensuring that findings are communicated transparently and that your internal security team is deeply involved.
  • Post-test support: After they conduct penetration testing, the engagement shouldn’t just end with a report. The right provider will offer support, guiding you through remediation strategies and offering insights on addressing identified vulnerabilities. Retesting services can also be a valuable addition to ensure vulnerabilities are effectively managed.
  • Comprehensive reporting: The deliverable report should be detailed, actionable, and clear. It should list vulnerabilities, rank them by severity, and offer mitigation strategies. Ensure that the provider presents a report that your team can swiftly act upon.
  • Cost and time considerations: Quality security testing is an investment. However, it’s essential to balance this with budgetary considerations. Choose a penetration testing provider offering competitive pricing that aligns with your timeline requirements.

Choosing the right third-party penetration testing service entails thoroughly evaluating expertise, past performance, approach, and collaboration. Investing time and diligence in this choice can profoundly impact your organization’s security preparedness and resilience.

Wrapping up

In an age when cyber-attacks became commonplace, the importance of digital security cannot be overstated. As organizations integrate more technology and handle vast amounts of data, the potential for vulnerabilities increases. While internal security teams play a crucial role in safeguarding an organization’s assets, the article clarified the need for third-party penetration testing services.

By leveraging ethical hacking practices through third-party penetration testing, organizations can identify and address vulnerabilities more effectively, meet regulatory requirements, and ensure that their systems and data remain secure. The process of selecting the right third-party testing provider is critical, as the assessment’s quality directly impacts the organization’s security posture.

In summary, third-party penetration testing is vital to a holistic cybersecurity strategy. It ensures that organizations fully understand their vulnerabilities and can take the necessary steps to address them. Investing in this service is a proactive measure towards enhanced security and data protection.


Why is third-party penetration testing important?

It offers an unbiased security assessment, uncovers hidden vulnerabilities, and meets regulatory requirements.

Can internal teams handle all penetration tests?

While internal teams play a key role, regulatory constraints and the need for an impartial view often necessitate external experts.

How do I choose the right penetration testing service?

Evaluate their expertise, track record, approach, communication, post-test support, and cost considerations.

About the author

Ewelina Baran

Ewelina Baran

Ewelina is a SEO copywriter specialized in technology, more specifically in cybersecurity. She holds a masters degree in English Philology from Jagiellonian University, Krakow.


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