How often should we run penetration tests?

At minimum once a year, and additionally after major system changes, new application launches or significant security incidents.

What is the difference between a vulnerability scan and a penetration test?

A vulnerability scan is largely automated and identifies potential issues, whereas a penetration test involves manual exploitation, validation of risk and detailed remediation guidance.

Can penetration testing cause downtime?

Engagements are carefully planned to minimise risk. High-impact tests are agreed in advance and we work closely with your team to avoid disruption.

Do you test both on-premises and cloud environments?

Yes. We can assess on-premises infrastructure, Active Directory, networks as well as Azure and Microsoft 365 environments.

Full Penetration Testing — United Kingdom

Web, Infrastructure, Active Directory and Cloud Testing for UK Organisations

Cyber Sentinel Solutions Ltd — London & Bristol, UK

We provide realistic, manual penetration testing of your web applications, APIs, internal and external networks, Active Directory and Azure/Microsoft 365 environments — tailored to UK businesses.

What Is a Full Penetration Test?

A penetration test (pentest) is a controlled security assessment where ethical hackers attempt to identify, exploit and document vulnerabilities in your systems before real attackers do.

A full-scope penetration test examines multiple layers of your environment — not just a single web application or server. It can include:

external network and internet-facing services
internal network and on-premises infrastructure
web applications, APIs and portals
Active Directory and identity infrastructure
Azure and Microsoft 365 configuration and access paths

The goal is to provide clear, risk-based insight into:

how your systems can be attacked in practice
which vulnerabilities are most critical for your business
how to remediate issues in a prioritised way

Why UK Organisations Need Regular Penetration Testing

UK businesses face increasing pressure from:

ransomware groups and cybercriminals
data protection regulations (e.g. GDPR)
industry standards and client security questionnaires
cyber insurance providers and underwriters

Penetration testing helps you:

identify real-world weaknesses before criminals do
demonstrate due diligence to regulators, insurers and clients
support risk-based decisions at board and management level
prioritise security investments based on evidence

Whether you are a law firm, financial institution, healthcare provider, SaaS company or SME, regular penetration testing is now considered a baseline control rather than a luxury.

Scope of Our Penetration Testing Services

1. External Network Penetration Testing

We assess internet-exposed services such as VPNs, firewalls, remote access portals, mail gateways and web servers. The goal is to understand how an attacker on the internet could gain a foothold.

port and service discovery
protocol and configuration weaknesses
password and authentication weaknesses
exploitation of known vulnerabilities and misconfigurations

2. Internal Network Penetration Testing

We simulate an attacker who has already gained access to your internal network — for example via a compromised laptop, VPN account or infected device.

network segmentation and trust relationships
unpatched systems and legacy services
weak internal protocols and plaintext credentials
movement towards critical servers and data

3. Web Application & API Penetration Testing

We perform manual, OWASP-aligned testing of your web applications and APIs, focusing on real exploitation instead of just running automated scanners.

OWASP Top 10 vulnerabilities
authorisation and access control flaws
session management weaknesses
business logic and workflow abuse
API-specific issues (authentication, rate limiting, input validation)

4. Active Directory Penetration Testing

Active Directory remains a primary target for attackers. We test whether an internal compromise can escalate to domain admin through:

misconfigurations and legacy domain settings
unconstrained and constrained delegation issues
privileged group memberships
Kerberoasting and AS-REP Roasting
password and credential reuse

5. Azure and Microsoft 365 Penetration Testing

Many attacks now target cloud identities and services instead of traditional infrastructure. We assess the security of:

Azure AD / Entra ID configuration
Conditional Access and MFA policies
role assignments and privileged identities
exposed applications and OAuth permissions
Microsoft 365 security configuration

Our Penetration Testing Methodology

Our approach combines:

industry frameworks (OWASP, NIST SP 800-115, PTES)
manual testing by experienced security professionals
carefully selected tools for efficiency and coverage
strict change control and communication to avoid disruption

Typical engagement phases:

Scoping and objective definition
Reconnaissance and mapping
Vulnerability identification and exploitation
Post-exploitation and impact assessment
Reporting and remediation guidance
Optional retesting of high-risk findings

Deliverables You Receive

At the end of each engagement, you receive clear, actionable documentation, typically including:

Executive summary and risk overview
Detailed technical report per system / app tested
proof-of-concept examples (screenshots, payloads, request/response samples)
severity ratings and business impact
prioritised remediation recommendations
optional live presentation or Q&A session for your team

The goal is to ensure that your technical and leadership teams understand both the severity and the business context of each finding.

When to Schedule a Penetration Test

before launching a new web application, API or cloud service
after major infrastructure or application changes
as part of annual security or compliance programmes
before audits, certifications or investor due diligence
when cyber insurance providers request evidence of testing

Who Is This Service For?

Our full penetration testing is ideal for:

SMEs and mid-market companies in the UK
law firms and professional services
financial services and fintech companies
healthcare and life sciences organisations
technology and SaaS providers
retail, logistics and manufacturing firms

Penetration Testing Pricing

Pricing depends on the number of systems, applications and locations in scope. Typical ranges for UK clients:

Web Application / API Penetration Testing

£2,000 – £6,000 per application

single web application or API
OWASP-aligned manual testing
detailed findings and remediation guidance

External / Internal Network Penetration Testing

£3,000 – £8,000 per environment

external perimeter assessment
internal network testing from a trusted position
Active Directory and lateral movement analysis (where in scope)

Full-Scope Penetration Testing Package

£7,500 – £18,000+

combined web, network, AD and cloud assessment
prioritised roadmap for the entire estate
ideal for annual or pre-audit testing

All engagements are quoted transparently after a brief scoping call.

Request a Penetration Test

If you are looking for full-scope penetration testing for your organisation in the UK, contact us to discuss your systems, timelines and objectives.

Cyber Sentinel Solutions Ltd
London & Bristol, United Kingdom

Email: contact@cybersentinelsolutionsltd.co.uk
Website: www.cybersentinelsolutionsltd.co.uk