CREST-certified testing of what could happen after an attacker, compromised device or malicious insider gains a foothold inside your network.
Internal network penetration testing assesses what could happen if an attacker gets inside your environment through phishing, a compromised laptop, weak remote access or an exposed internal system.
SME Cyber Solutions tests internal networks for UK SMEs that need to understand how far an attacker could move and which controls would slow or stop them.
Network discovery and access paths. We assess internal services, segmentation, weak protocols, shared credentials and routes between systems.
Identity and privilege risk. We review Active Directory exposure, local admin patterns, password reuse, privilege escalation opportunities and excessive permissions.
Sensitive data exposure. We look for routes to file shares, business systems, backups, admin tools and data that would matter in a real incident.
Lateral movement paths. Weak segmentation or shared credentials can let one compromised machine become a wider network compromise.
Privilege escalation. Misconfigurations may allow a standard user or compromised device to gain administrative access.
Excessive file or system access. Sensitive shares, backups or applications may be reachable by more users than intended.
Internal network testing is useful for SMEs with office networks, servers, Active Directory, file shares, hybrid cloud access, regulated data, cyber insurance requirements or previous security incidents.
A typical scope includes locations, network ranges, test account assumptions, device access, excluded systems, permitted techniques and emergency contacts. Testing can be performed onsite or remotely depending on access and environment.
You receive a clear report with an executive summary, technical findings, evidence, affected assets, risk ratings and recommended remediation. We prioritise the issues that could cause real business harm and explain them in a way that owners, technical teams and external stakeholders can act on.
After remediation, we can re-test agreed findings and provide updated documentation confirming whether the vulnerabilities have been resolved.
What is internal network penetration testing?
It is a controlled assessment of internal systems and identity controls, focused on what an attacker could do after gaining a foothold inside the network.
Do you need administrator credentials?
Not always. Testing can be scoped from unauthenticated, standard user or assumed breach perspectives depending on the objective.
Can internal testing be done remotely?
Yes, in many cases. Remote testing depends on agreed access, network design and the systems included in scope.
Internal testing is strongest when the internet-facing attack surface is also understood. Pair this with external network penetration testing if VPNs, firewalls, cloud services or public servers are in scope.
This service is part of our wider penetration testing for UK SMEs. If you are unsure what to test first, book a scoping call and we will help define a practical, fixed-scope engagement.
Tell us what systems you rely on and we will recommend a practical penetration testing scope.