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Knowledge base Updated: February 5, 2026

TISAX and automotive supply chain security: The importance of penetration testing

How does TISAX penetration testing enhance automotive security?

Grzegorz Gnych Grzegorz Gnych

The automotive industry is characterized by complex and extensive supply chains in which the exchange of sensitive data is a daily occurrence. In response to growing cyber threats and the need to standardize information security, TISAX (Trusted Information Security Assessment Exchange) was created. Understanding its role and linking it to proactive measures such as penetration testing is crucial for any company operating in this sector. Nflo, as a TISAX cyber security and consulting partner, is helping automotive companies to effectively manage their risks.

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What is TISAX and why is it crucial to the automotive industry?

TISAX is an information security assessment standard developed specifically for the automotive sector by the German Automotive Industry Association (VDA) in cooperation with the ENX Association. Its main objective is to ensure a uniform level of protection for data exchanged between vehicle manufacturers, component suppliers and service providers. The standard is based largely on the requirements of ISO/IEC 27001, adding automotive-specific criteria for such things as prototype protection or security of connections with partners. TISAX certification is increasingly becoming a prerequisite for establishing or continuing cooperation with major players in the automotive market.

Implementing and maintaining TISAX compliance is not just a formality. It’s a process that makes a real difference in improving a company’s resilience to cyber attacks. It requires a systematic approach to information security management that includes identifying assets, assessing risks, implementing appropriate controls and reviewing them regularly. For many companies in the automotive industry, especially smaller ones, going through this process alone can be a challenge, so the support of an experienced partner like nFlo proves invaluable. The TISAX standard defines different Assessment Levels (ALs), which depend on the type of data processed and the degree of protection required, which translates into the scope and rigor of the audit.

The importance of TISAX goes beyond mere compliance. Companies that successfully pass the assessment demonstrate their commitment to protecting sensitive data, which builds trust among business partners and customers. In an era of growing awareness of cyber threats, a proven level of security is becoming an important competitive advantage. TISAX helps standardize security expectations across the supply chain, reducing the risk of incidents resulting from weak links in the business network.

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What are the main cyber security risks in the automotive supply chain?

The automotive supply chain is an attractive target for cybercriminals because of the enormous value of the data processed and the potential impact of a successful attack. One of the main threats is the theft of intellectual property, including designs for new vehicle models, technology or R&D data. Leakage of such information can lead to loss of competitive advantage and huge financial losses. Criminals can target both large manufacturers and smaller suppliers, which often have less robust security, treating them as a gateway to a major partner’s systems.

Another significant risk is attacks aimed at disrupting production. In modern factories, where IT systems are tightly integrated with operational technologies (OT/ICS), a ransomware attack or other act of sabotage can bring production lines to a halt. The consequences of such an incident are not only direct financial losses, but also delivery delays, contractual penalties and reputational damage. The security of industrial control systems (ICS) is therefore becoming a key element of protection in the context of TISAX.

The increasing digitization and connectivity of vehicles (connected cars) are creating new attack vectors. Hackers may attempt to take control of vehicle functions, gain access to driver data, or use the car as an entry point into other systems. The security of software and on-board systems, as well as communications infrastructure, is critical and is being assessed under TISAX. In addition, security weaknesses at one vendor can be exploited to launch an attack on the entire network of relationships, underscoring the importance of security for the entire ecosystem.

Phishing attacks and other forms of social engineering are a common threat, taking advantage of human inattention to gain access to systems or data. In the context of a supply chain, a compromised account of an employee of one partner can be used to send an infected attachment or link to subsequent companies, spreading the threat. That’s why TISAX also emphasizes employee security awareness and proper handling procedures.

How does penetration testing help meet TISAX requirements?

Penetration testing is a practical verification of the effectiveness of implemented security measures, which is one of the key aspects required by TISAX. The standard, based on ISO 27001, requires organizations to regularly test, assess and evaluate the effectiveness of technical security measures. Conducting penetration tests provides objective evidence of the existence (or absence) of security vulnerabilities that could be exploited by attackers to compromise the confidentiality, integrity or availability of information.

Many of the security controls defined in the VDA ISA (Information Security Assessment) catalog, on which TISAX is based, directly relate to vulnerability management and security testing. For example, technical vulnerability management (Vulnerability Management) requirements involve identifying, assessing and remediating vulnerabilities. Penetration tests are one of the most effective methods for identifying these vulnerabilities in a real-world environment, going beyond theoretical analysis or automated scanning. They make it possible to verify that the identified vulnerabilities are actually exploitable.

TISAX also places great emphasis on the security of connections to business partners and suppliers. Penetration tests can include verifying the security of data exchange interfaces, supplier portals or other points of contact between systems of different organizations. This allows for the assessment of risks associated with the entire ecosystem and the identification of vulnerabilities in the supply chain, which is in keeping with the spirit of TISAX, which aims to ensure a consistent level of security across all participants.

The results of penetration testing provide valuable feedback that can be used to improve existing security features and procedures. The test report usually includes a detailed description of the vulnerabilities found, an assessment of their criticality and recommendations for remediation. The organization can use this information to prioritize actions, allocate resources more efficiently and continuously improve its security level, which is in line with the Deming cycle (PDCA) underlying management systems such as ISO 27001 and TISAX.

What specific areas should penetration testing cover in the context of TISAX?

The scope of penetration testing in the context of TISAX should be carefully selected to reflect the specific risks and requirements of the automotive industry. A key area is systems that store and process sensitive data, such as engineering designs (CAD/CAM), prototype data, test results, customer information or business strategies. Tests should verify the security of these systems against unauthorized access, modification or data leakage, both from the perspective of an external attacker and an internal attacker (insider threat).

Due to the integration of IT and OT, special attention must be paid to industrial control systems (ICS/SCADA) and production lines. Penetration tests in this area, often referred to as OT security tests, must be carried out with special care so as not to disrupt production processes. Their goal is to identify vulnerabilities that could enable sabotage, theft of production data or taking control of machines. nFlo’s experience in testing OT environments is a key asset here.

Another important area is interfaces and systems for communicating with supply chain partners. These can be supplier portals, EDI (Electronic Data Interchange) systems or dedicated APIs. Testing should assess the security of these connections, checking for the possibility of unauthorized access to a partner’s data or the use of the connection as an attack vector against the company’s own systems. TISAX requires security at the interface with external parties, and penetration testing is an effective way to verify these mechanisms.

In the context of the growing number of connected cars, it is also becoming important to test the security of on-board components and systems, as well as the associated backend infrastructure. While testing the vehicles themselves is mainly the domain of OEMs, component and software suppliers also need to ensure the security of their products. Testing can include analysis of software, communication interfaces (e.g., Bluetooth, Wi-Fi, GSM) and mobile applications for interacting with the vehicle.

In addition to TISAX compliance, what benefits does penetration testing bring to automotive companies?

The primary benefit of regular penetration testing is the significant strengthening of a company’s overall cyber security. Identifying and fixing viable security vulnerabilities before they are exploited by cybercriminals directly translates into a reduction in the risk of incidents such as data leaks, ransomware attacks or operational disruptions. This, in turn, protects the company from potential financial losses, reputational damage and legal consequences.

Conducting penetration tests by a reputable partner, such as nFlo, and presenting the results (even in the form of a general confirmation) to business partners can significantly boost their confidence. In the automotive industry, where collaboration and data sharing are key, demonstrating a proactive approach to security builds the image of a reliable and responsible partner. This can be an important factor in negotiating contracts and maintaining long-term business relationships.

Penetration tests provide objective data on the state of security, allowing for more informed IT and cyber security investment decisions. Instead of relying on blanket recommendations, a company can focus its resources on remediating the most serious identified threats, leading to optimized spending and maximized security return on investment (ROI). Test results help justify the need for specific changes or the purchase of new technologies to management.

In an industry as innovative as automotive, protecting intellectual property is absolutely crucial. Penetration tests help verify that systems storing valuable designs, research data and other sensitive information are adequately protected against theft or industrial espionage. Effective IP protection is fundamental to maintaining a competitive edge and long-term success in the marketplace.

Summary Box: Key Points

  • TISAX: Information security standard for the automotive industry, key to supply chain collaboration.

  • Threats: IP theft, production disruption (OT/ICS), attacks on connected vehicles, weaknesses in the supply chain.

  • Role of Pentests: Practical verification of security features required by TISAX, identification of viable vulnerabilities.

  • Scope of Testing: Systems with sensitive data, OT/ICS, connections to partners, connected car components.

  • Benefits: Strengthen security, build partner trust, optimize investments, protect IP, comply with TISAX.

TISAX decides who is invited to tender

For a supplier in this industry the label is rarely about security posture in the abstract — it is about market access. Manufacturers increasingly make a valid TISAX assessment a precondition for receiving a request for quotation at all, which turns the certificate into a commercial asset with a renewal date. Suppliers who start the process when a customer asks are typically several months too late.

Preparing for the assessment and closing the gaps it will surface is the scope of TISAX area reviews and consulting for the automotive industry.

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