Find the vulnerability, then close it
Penetration Testing, Vulnerability Management and Secure Code Analysis
We identify, prioritise and report vulnerabilities across your web, mobile and network infrastructure from a real attacker's perspective. Then we show what sets us apart: we apply the necessary patches and code fixes ourselves. We work with open source tools, on-premise within your own infrastructure; your data never leaves your organization.
Penetration testing vs vulnerability management
A penetration test (pentest) reveals the vulnerabilities in your systems at a specific point in time by trying, in a controlled way, what a real attacker could do. Vulnerability management turns that one-off snapshot into a continuous cycle: it monitors new vulnerabilities, matches them against your assets and tracks their remediation. Together they protect your security over time, rather than leaving it to a single audit.
The C3T difference begins where the report ends. Most consultancies list their findings and walk away; we prioritise the vulnerabilities, apply patches and code fixes with the support of on-premise AI, and verify the result by re-testing.
How does C3T's penetration testing service work?
C3T tests web, mobile and network infrastructure with real attack scenarios, presents the vulnerabilities found in a report prioritised by severity, applies the necessary patches and code fixes itself, and verifies the result by re-testing. Continuous vulnerability management (OpenVAS + Nmap) provides asset discovery, shadow IT detection and monitoring of new vulnerabilities; SonarQube-based SAST source code analysis catches security flaws before they are written into code. All tools are open source and run on-premise within the organization's own infrastructure; source code and vulnerability data never leave the organization. This approach meets the vulnerability management requirements of ISO 27001 A.12.6.1, the technical measures of KVKK Article 12 and the Information and Communication Security Guide (BİGR).
Scope: what we do
We tackle security vulnerabilities along two axes: a point-in-time penetration test and a lasting vulnerability management cycle. Both run on-premise and are fully auditable.
Penetration testing (pentest)
Finds vulnerabilities from a real attacker's perspective, then closes them.
- Web, mobile and network/infrastructure penetration testing
- Vulnerability detection with real attack scenarios
- Report prioritised by severity
- Closing the vulnerability: patching and code updates (the C3T difference)
- Verifying the fix through re-testing
Continuous vulnerability management
Not a one-off test but a lasting security cycle.
- Automated vulnerability scanning (OpenVAS)
- Asset and inventory discovery (Nmap)
- Shadow IT detection
- Continuous monitoring of new vulnerabilities
- Remediation tracking by risk priority
Secure code analysis (SAST)
With static source code analysis (SAST) we catch security vulnerabilities before they reach production. We combine a SonarQube-based stack with on-premise AI, prioritise the findings and feed remediation suggestions straight to your development team. Your source code is reviewed without ever leaving your organization, so security is built into your DevSecOps flow from the start.
Open source stack and on-premise AI
We work by three principles: open source tools, on-premise AI and a hands-on approach.
Open source stack
Instead of expensive commercial licences we work with mature open source tools such as SonarQube, OpenVAS and Nmap; no vendor lock-in.
On-premise AI
We use on-premise AI for SAST code analysis and anomaly prioritisation; source code and vulnerability data never leave your organization.
Hands-on approach
C3T is not a consultant who writes a report and leaves; we are the implementing partner that prioritises the vulnerability, applies the patch and verifies the result.
Which compliance obligations it addresses
Penetration testing and vulnerability management map directly to the technical obligations of three core frameworks.
ISO 27001 A.12.6.1
The technical vulnerability management control requires vulnerabilities to be identified, assessed and remediated in a timely manner. Our continuous vulnerability management addresses this control directly. C3T is not a certificate holder; we work within the scope of ISO 27001 compliance and certification readiness.
KVKK Article 12 technical measures
KVKK mandates appropriate technical measures to secure personal data. Penetration testing and vulnerability management fulfil this obligation by closing vulnerabilities before they can be exploited. Your data never leaves your organization throughout the test.
BİGR vulnerability management
The Presidential Information and Communication Security Guide (BİGR) expects regular vulnerability management for the public sector and critical infrastructure. By building the process on open source tools and on-premise, we help institutions achieve compliance on a modest budget.
Why C3T
We deliver closed vulnerabilities, not just a report
Most penetration testing companies list their findings and walk away; the burden of remediation stays with you. C3T is the implementing partner: we prioritise the vulnerability, apply the patch and code fix, and verify the result by re-testing. The entire process runs on open source tools and on-premise within your own infrastructure; source code and vulnerability data never leave your organization.
We are transparent about certification: we have formally initiated the process of becoming a TSE Class C Certified Penetration Testing Company and our in-house specialist is going through the TSE-registered penetration tester process. Until the certificate is finalised we do not present this status as complete; we share the situation as it stands.
Frequently asked questions
Do you fix the vulnerabilities yourselves after the penetration test?
Yes. C3T does not simply report findings and walk away; we prioritise vulnerabilities by severity, apply the necessary patches and code updates, and verify the fix by re-testing. That is the difference: we deliver closed vulnerabilities, not just a report.
Does our data leave the organization during testing?
No. The tools we use are open source and run on-premise, within your own infrastructure (on your own hardware). Vulnerability data, source code and test output never leave your organization, preserving the technical measures required by Article 12 of KVKK (Turkish Personal Data Protection Law) and your data sovereignty.
Are you a TSE-certified penetration testing company?
We have formally initiated the process of becoming a TSE Class C Certified Penetration Testing Company; our in-house specialist is going through the TSE-registered penetration tester process. Until the certificate is finalised we do not present this status as complete; in line with our transparency principle, we share the current state of the process openly.
Which systems do you test?
Web applications, mobile applications, network and server infrastructure, and the source code itself (SAST) are all in scope. Through asset and inventory discovery we map your system inventory and also detect shadow IT systems that were never recorded in it.
Is vulnerability management a one-off exercise or continuous?
A penetration test gives you a security snapshot at a specific point in time; vulnerability management is continuous. We monitor newly published vulnerabilities, match them against your assets and track their remediation by risk priority. Together they form a lasting security cycle.
Which compliance obligations does this address?
Continuous vulnerability management and technical vulnerability tracking map directly to the ISO 27001 A.12.6.1 technical vulnerability management control, the technical measures obligation under Article 12 of KVKK, and the vulnerability management clauses of BİGR (Turkey's Information and Communication Security Guide).
Which vulnerabilities are in your systems?
Let's assess your web, mobile and network infrastructure together. In a free security feasibility call we'll clarify what needs to be tested and how the vulnerabilities will be closed.