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Penetration Testing Services
Identify vulnerabilities before attackers do
Our experts provide detailed findings and actionable recommendations, enabling your organisation to fix vulnerabilities, strengthen defences, and reduce the risk of a costly breach.
About Penetration Testing
We deliver comprehensive, real-world penetration testing designed to expose hidden security vulnerabilities before malicious actors do. Our approach replicates real-world attacks, identifying and exploiting security weaknesses across your systems, networks, and applications, including cloud platforms, web applications, and even physical infrastructure.
Unlike generic automated vulnerability scanning, our manual penetration testing is performed by highly skilled, CREST-certified experts who bring deep knowledge of cyber threats, complex vulnerabilities, and the evolving tactics of threat actors. From vulnerability analysis to remediation guidance, we are your trusted penetration testing company for securing today’s digital enterprise.
Our Penetration Testing services include:
- Web Applications – Ecommerce platforms, portals, blogs, APIs
- Infrastructure Testing – Internal, external, cloud environments
- Mobile App Testing – iOS, Android, and Windows
- Remote Access & VPN Systems
- PCI-DSS Penetration Testing
- Physical Penetration Testing – Simulated intrusions for physical sites
- Social Engineering – Email phishing, impersonation, and more
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Why choose Zensec
We combine deep technical expertise with practical, real-world experience to deliver CREST-accredited penetration testing services that truly make a difference. Our cyber security experts don’t just run scans, they identify and exploit vulnerabilities the way real attackers would, helping you uncover security flaws before they become security incidents. We tailor every engagement to your specific business operations, including cloud platforms, computer systems, and critical assets, ensuring complete alignment with your threat landscape.
Our transparent scoping process means you get clear insight into your pen test cost before anything begins. We provide detailed reports with actionable remediation advice, and support you beyond the test with strategic guidance. Whether you’re pursuing compliance with frameworks like Cyber Essentials or defending against the latest emerging threats, we deliver results that strengthen your security posture. Zensec ensures your investment delivers not just visibility, but lasting protection, through rigorous testing, expert support, and a commitment to ongoing improvement with regular penetration tests on a continuous basis.
We are equipped to deal with an attack from any ransomware group.
Don’t hesitate to contact us if you are under attack from a ransomware group not listed above.
The importance of Penetration Testing
Penetration testing is a vital part of any robust information security strategy. As cyber threats grow more advanced and persistent, it’s no longer enough to rely on off-the-shelf solutions or reactive measures.
Regular testing helps organisations identify security weaknesses before attackers do, simulating real-world exploits to expose known vulnerabilities and uncover risks that automated tools may miss. It ensures your defences are validated under pressure, helping to protect sensitive information, maintain compliance, and reduce overall security risk. With the insights gained, you can close gaps, prioritise remediation efforts, and implement stronger technology solutions that safeguard both your systems and valuable data. Ultimately, penetration testing offers a complete picture of your security posture and the confidence to operate securely in today’s threat landscape.
Known threat actors
Ransomware groups behind the attacks
Below is a breakdown of the most active ransomware groups and the variants driving their attacks.
The Zensec 6-step Penetration Testing process
We don’t just run tools, we simulate offensive security tactics to give you a complete picture of your organisation's security posture.
1. Pre-engagement scoping
We define test goals, target areas, and align with business needs. This step determines your pen test cost accurately and helps us tailor the penetration testing process to your infrastructure.
2. Intelligence gathering
Using both automated tools and manual methods, we collect details on IP addresses, configurations, sensitive data, and exposed assets, even from the dark web, to mimic real cyber attacks and uncover hidden threats across all environments.
3. Reconnaissance
Our testers thoroughly map out your network infrastructure, pinpoint key interaction points, and assess the technologies used to identify security gaps, misconfigurations, and possible access routes attackers could exploit.
4. Vulnerability analysis
We combine automated scanning and manual testing to identify vulnerabilities, confirm exposures, and locate zero-day threats. Tools like Nessus and OpenVAS are supplemented with our in-house tech for a deeper scan.
5. Exploitation
This is where we safely attempt to gain access to systems and data, replicating the behavior of a real attacker. From exploiting security flaws in web applications to accessing compromised systems, our goal is to show the impact of each weakness.
6. Post-exploitation & reporting
We assess business impact, analyse findings, and deliver a comprehensive report, complete with remediation advice, risk rankings, and a strategic consultation to close the loop. You also have the option for a free retest to validate fixes.
We can help
Frequently asked questions
Key information when you’re under pressure.
Penetration testing is a controlled, simulated cyber attack carried out by ethical hackers or a pen test expert to evaluate the strength of your organisation’s digital defences. Its primary goal is to identify security weaknesses across your systems, networks, applications, and infrastructure before real attackers can exploit them.
By exposing security vulnerabilities in a safe, professional manner, penetration testing helps prevent data breaches, service disruptions, and damage to your reputation. It also supports ongoing protection by enabling you to address issues proactively, validate existing security controls, and continuously improve your organisation’s cyber resilience over time.
If you’re under active attack, call us immediately. Zensec provides rapid ransomware support and expert incident response to help contain threats, recover safely, and prevent further damage. Our cyber team is trained to act fast under pressure.
We test everything from web applications, cloud platforms, and mobile apps, to network infrastructure, VPN systems, and even physical access controls. Whether you're securing APIs, internal systems, or public-facing services, our tests are customised to match your environment.
We stand out by combining manual penetration testing with automated testing, CREST penetration testing services, and real-world offensive security techniques to deliver deeper, more meaningful insights. While many providers rely heavily on tools, our approach balances automation with expert analysis to ensure nothing is missed.
Our pen test experts are registered ethical security testers who go beyond just identifying vulnerabilities, they provide strategic advice, detailed reporting, and a free retest to validate your remediation efforts. We also focuse on delivering cost-effective solutions tailored to your risk profile and business needs, helping you maximise ROI while improving your information security posture.
Physical penetration testing is a specialised form of security testing that simulates real-world break-in attempts to assess how easily an attacker could gain unauthorised access to your premises, facilities, or sensitive areas. This can include techniques such as tailgating, lockpicking, bypassing security controls, or impersonating staff.
While many organisations focus on digital threats like malware and cloud security breaches, physical vulnerabilities can pose just as significant a security risk, often leading to the compromise of critical assets, computer systems, and sensitive data. Our expert penetration testers identify and exploit weaknesses in your physical defences to expose gaps that traditional assessments, especially those focused solely on digital or cloud security, may overlook.
This form of testing is essential for organisations seeking to strengthen their overall cyber security posture and implement effective, real-world technology solutions that protect both digital and physical environments.
The pen test cost depends on the scope, complexity, and type of systems being tested. We offer a free scoping session to understand your needs and provide a tailored pen test quote. No guesswork, just clear pricing aligned with your goals.
Dealing with a ransomware attack?
Our ransomware recovery service can help
Our expert team works quickly to contain the breach, recover your data, and restore your systems to full operation. We’ll guide you through every step of the recovery process and help strengthen your defences to prevent future attacks. Regain control with Zensec - trusted support when it matters most.