Penetration Testing
Simulated cyber attacks to uncover hidden risks and secure your systems before real threats strike.
Seriun are Crest accredited
As a CREST-accredited penetration testing provider, we’re recognised for meeting the highest standards in technical capability and ethical testing. This sought-after certification means we’re trusted to carry out official, industry-approved penetration tests that deliver real assurance.
Our team also holds Cyber Essentials Plus certifying body status and is an IASME-accredited partner, giving us deep insight into the threat landscape and compliance requirements.
Benefits
Identify Vulnerabilities Before Attackers Do
Penetration testing simulates real-world cyber attacks to identify weaknesses in your system, providing a clear, actionable roadmap to strengthen your security and reduce the risk of cyber incidents.
Proactively Prevent Costly Data Breaches
Penetration testing helps you discover hidden vulnerabilities before they become serious threats, allowing you to implement targeted fixes and reduce the financial and reputational impact of potential attacks.
Demonstrate Commitment to Compliance and Security
Penetration testing helps you meet industry standards by thoroughly assessing your environment and addressing compliance gaps, showcasing your commitment to protecting customer data and business assets.
How Seriun’s cyber team
will help you achieve more
Our Comprehensive Penetration Testing Services
Infrastructure Testing
We carry out infrastructure penetration testing to help you uncover and fix security weaknesses across your internal networks and systems. This typically includes testing your servers, workstations, network devices (like switches, routers, and firewalls), security controls, and Active Directory.
We use a combination of automated tools and manual testing techniques. Automated tests are great for quickly spotting known vulnerabilities, while manual testing goes deeper – simulating real-world attacks to see how far a threat could get and what damage it might cause. This balanced approach gives you a realistic view of how secure your infrastructure really is.
After every test, you’ll receive a clear, detailed report. It outlines what we found, why it matters, and how to fix it – with evidence, risk ratings, and straightforward recommendations. Where necessary, we’ll also attempt to exploit vulnerabilities to show you the potential impact.
Every business is different, so we tailor each test to your specific needs. If there are particular systems or technologies you’d like us to focus on, we’ll build that into the scope from the start.
Web Application Testing
Our web application penetration testing helps you find and fix security issues that could put your data, users, or systems at risk. We test against the OWASP Top 10 – the industry standard for identifying the most common and dangerous vulnerabilities in modern web apps.
We typically look at areas like authentication, session management, access control, input validation (e.g., SQL injection), business logic flaws, and misconfigurations like missing or insecure headers. During testing, we’ll attempt to safely exploit any weaknesses we find to show how they could be used in a real-world attack.
As with our infrastructure testing, we use a mix of automated scans and manual techniques. Automation is great for catching common issues quickly, while manual testing lets us dig deeper – simulating more complex attacks and uncovering problems automated tools often miss. If you have a specific feature you want us to focus on – like the login or password reset flow – we’re happy to tailor the test.
If your application includes an API, we can test individual endpoints to make sure they’re not leaking sensitive data or allowing unauthorised access.
After testing, you’ll receive a clear, easy-to-read report explaining what we found, why it matters, and how to fix it – even if your team doesn’t have a deep security background.
Every application is different, so we tailor our approach to match your setup and goals.
Physical Penetration Testing
Cyber security often gets the spotlight – but protecting your physical premises is just as important. Our physical penetration testing service helps you understand how vulnerable your organisation is to real-world intrusions and unauthorised access.
We simulate the tactics a determined intruder might use, including tailgating, alarm evasion, exploiting CCTV blind spots, and impersonation techniques to test how easily someone could bypass physical security controls. We also assess risks like unattended devices, exposed network ports, and opportunities for data theft or tampering.
These tests highlight gaps in policies, staff awareness, and procedures. Whether it’s weaknesses in access control, visitor handling, or device security, we provide clear, practical advice to help you tighten your physical defences and reduce risk.
Social Engineering & Initial Access Testing
Technology can block a lot of threats – but people are still the most common way attackers get in. Our Social Engineering and Initial Access Testing focuses on how easily a real-world attacker could gain a foothold in your organisation by targeting your users.
We use open-source intelligence (OSINT) to identify real employees – including names, roles, and email addresses – and then craft tailored phishing campaigns using spoofed domains and realistic messaging that mimic actual attacker techniques.
The goal? To gain access to a user’s device – and then assess how far an attacker could go. That might mean escalating privileges, harvesting credentials, or moving laterally across your network. We often uncover issues like users with unnecessary admin rights, cached credentials, or access to sensitive internal systems.
This type of testing highlights the human element of security, but it also surfaces technical misconfigurations and gaps in endpoint protection. You’ll receive a detailed report with actionable insights to strengthen both user awareness and technical safeguards.
