Preparing for the Cyber Resilience Act: A Guide for Embedded Device Manufacturers (10 May 2026)

By DNSystems LLC (dnsystemsllc.com)

The Cyber Resilience Act (CRA) will soon reshape how embedded device manufacturers approach security.

Embedded systems, IoT devices, and hardware products must comply with strict requirements that cover everything from risk assessment to incident reporting.The CRA will change how manufacturers selling into the EU manage device security. With full applicability on 11 December 2027, EU-based makers and any vendors placing products on the European market must meet new mandatory security rules.

Cyber Resilience Act (CRA) 2027

Embedded systems, IoT products, and hardware will be subject to requirements ranging from product risk classification and secure‑by‑design to automatic updates and incident reporting.

DNSystems’ hardware security and cybersecurity consulting services provide a practical, compliance‑focused route to meet those obligations.

This guide outlines the CRA’s core requirements and maps DNSystems’ services to each to help manufacturers achieve timely readiness. DNSystems breaks down the CRA’s key demands and shows how DNSystems’ services align with each, helping manufacturers prepare effectively. Let's go!

• Understanding Product Classification and Risk Assessment

The CRA requires manufacturers to classify their products based on risk levels and define compliance obligations accordingly. This step is critical because it determines the depth of security measures needed.

DNSystems supports this process by running device classification workshops that bring together product teams and security experts. These workshops help identify the device’s intended use, threat landscape, and potential vulnerabilities. Following this, DNSystems performs threat modeling and risk assessments tailored to the device’s architecture and environment. The output includes detailed documentation that manufacturers can use to justify their CRA categorization.

For example, a smart thermostat used in residential settings might fall into a lower risk category than an industrial control system, which requires more stringent controls.

• Building Security by Design and Default

The CRA emphasizes minimizing vulnerabilities from the earliest stages of product development. This means manufacturers must embed security into the design and ensure devices ship with secure default settings.

DNSystems integrates secure design reviews into the development lifecycle. These reviews assess hardware architecture, firmware design, and communication protocols to identify weak points before production. The firm also applies hardware threat modeling to anticipate attack vectors specific to embedded devices.

A key part of this service is ensuring devices are secure by default. DNSystems recommends disabling debug interfaces that could expose sensitive information and implementing unique device credentials to prevent unauthorized access. For instance, instead of generic passwords, each device receives a unique cryptographic key during manufacturing.

• Managing Software Bills of Materials and Component Provenance

Tracking software and hardware components is a CRA requirement that helps manufacturers maintain transparency and traceability. This is essential for identifying vulnerabilities and managing supply chain risks.

DNSystems produces Software Bills of Materials (SBOMs) by extracting firmware and identifying all included components. This process uncovers third-party libraries, open-source code, and hardware modules embedded in the device. When supplier attestations are unclear or incomplete, DNSystems uses reverse engineering techniques to validate component provenance.

For example, if a device includes a wireless module from a new supplier, DNSystems can verify that the module’s firmware matches the supplier’s claims and does not introduce hidden vulnerabilities.

• Designing Automatic Updates and Patch Management

The CRA mandates that manufacturers provide timely, automatic security updates throughout the product’s lifecycle. This helps fix vulnerabilities before attackers can exploit them.

DNSystems designs and tests over-the-air (OTA) update mechanisms that ensure firmware and software can be securely updated without user intervention. Their approach includes signed firmware updates to prevent tampering and secure boot enforcement to verify the integrity of the device’s software at startup.

Rollback mechanisms are also tested to allow devices to revert to a previous safe state if an update fails. DNSystems validates these features during firmware and OTA assessments, ensuring updates are reliable and secure.

• Implementing Vulnerability Management and Incident Reporting

Detecting and responding to security incidents quickly is a core CRA requirement. Manufacturers must have systems in place to detect threats, triage incidents, and report them within regulatory timeframes.

DNSystems helps implement detection telemetry that monitors device behavior for anomalies. They also set up forensic logging to capture detailed information during incidents, which supports investigation and remediation.

To prepare teams, DNSystems runs incident response tabletop exercises and live validation drills. These exercises simulate real-world attacks and test the manufacturer’s ability to meet CRA reporting deadlines. For example, a simulated firmware compromise might trigger a full incident response workflow, ensuring readiness.

• Conducting Testing, Assurance, and Third-Party Audits

The CRA requires evidence of security testing that matches the product’s risk level. This includes penetration testing, fuzzing, and hardware fault injection.

DNSystems offers penetration testing services focused on IoT devices, hardware, and firmware. Their experts simulate attacks to uncover vulnerabilities that automated tools might miss. They also perform fuzz testing to identify software bugs by feeding unexpected inputs to the device.

For hardware, DNSystems uses FPGA and fault injection testing to assess how devices respond to physical tampering or environmental stress. These tests provide assurance that the device can withstand real-world attacks.

DNSystems can coordinate third-party audits to provide independent validation of security claims, which manufacturers can present as part of their CRA compliance documentation.

The CRA imposes lifecycle cybersecurity obligations on products with digital elements. For embedded and IoT device manufacturers, compliance requires changes across design, supply chain, development and post-market processes.

Below is a prescriptive roadmap.

You can adopt it now to be ready by the CRA’s full applicability date in December 2027!

1. Determine your product categorization and obligations (assume high-level categories)

Action: Classify each product according to CRA risk categories (critical/essential/high-risk vs lower-risk) and document the rationale. Treat uncertain cases conservatively.

Outcome: Knowing classification guides testing, documentation, and reporting obligations.

2. Implement secure-by-design and secure-by-default practices

Action: Adopt secure defaults (unique credentials per device, disabled debug interfaces, minimized open ports), apply threat modeling for each product family, and embed security gates in design reviews.

Outcome: Reduced baseline vulnerabilities and simpler compliance.

3. Establish product cybersecurity lifecycle processes

Action: Define and document processes for vulnerability management, secure development (SDL), risk assessment, patch management, and end-of-life policies. Map responsibilities and timelines.

Outcome: Demonstrable organizational processes required under CRA.

4. Build an SBOM and component provenance program for hardware and software

Action: Maintain a Software Bill of Materials (and hardware component list) tracking versions, suppliers, and known vulnerabilities. Integrate supplier attestations and model/component provenance where relevant.

Outcome: Faster vulnerability triage and compliance evidence.

5. Strengthen update and patching infrastructure (automatic updates required)

Action: Implement robust OTA update mechanisms that support authenticated, signed updates; test staged rollouts and automatic rollback; ensure updates can be delivered for the product’s declared support lifetime.

Outcome: Compliance with CRA’s automatic update expectations and reduced exploitation window.

6. Implement secure default configurations and hardening checklists

Action: Provide hardened default configurations, documented secure setup steps for integrators/users, and prevent insecure factory settings (e.g., default passwords).

Outcome: Fewer in-field vulnerable devices and clearer evidence for auditors.

7. Incident reporting and post-market surveillance capabilities

Action: Create an incident response and reporting workflow aligned to CRA timing and content requirements: detection, triage, containment, remediation, and reporting to authorities within specified windows. Log telemetry and maintain forensics-ready records.

Outcome: Ability to meet mandatory incident reporting and post-market surveillance duties.

8. Testing and assurance: vulnerability testing, penetration tests, and independent audits

Action: Integrate regular security testing: SAST/DAST for software, firmware analysis, hardware security reviews, fuzzing, and red-team exercises. Budget for independent third-party assessments for higher-risk products.

Outcome: Concrete evidence of security due diligence and higher assurance levels.

9. Documentation, labeling and user information requirements

Action: Prepare clear security documentation: expected lifetime, supported update cadence, known limitations, secure configuration instructions, and contact paths for vulnerability reporting. Ensure product information aligns with CRA labeling expectations.

Outcome: Transparent user guidance and audit-ready documentation.

10. Supply chain and vendor management improvements

Action: Require security SLAs and attestations from suppliers, evaluate component security practices, and manage third-party risk for embedded components, model suppliers, and cloud services.

Outcome: Stronger provenance and lower third-party risk exposure.

11. Key management and cryptographic hygiene

Action: Use secure elements or TPMs for key storage where feasible, rotate keys, protect signing keys for updates, and avoid shipping devices with extractable root keys.

Outcome: Secure update verification and tamper-resistant trust anchors.

12. Organizational readiness: roles, training and legal alignment

Action: Assign a CRA compliance lead, train engineering and product teams on CRA requirements, and align legal and product teams for reporting obligations. Update contracts with distributors and OEMs to reflect responsibilities.

Outcome: Faster decision-making and clear accountability during incidents or audits.

13. Product design choices to reduce CRA burden

Action: Where possible, choose modular architectures that decouple high-risk components, enable simpler patching, or allow critical functions to be isolated from network-exposed elements.

Outcome: Narrower attack surfaces and simpler compliance pathways.

14. Plan for long-term support and EoL policies

Action: Commit publicly to update/support lifetimes consistent with product expectations and CRA obligations; budget for long-term patching costs into product lifecycles.

Outcome: Avoid unsupported devices becoming systemic risks.

Concrete 18–36 month implementation roadmap (high-level)

• Months 0–6: Product inventory & classification; appoint CRA lead; begin SBOM efforts; secure update architecture design.

• Months 6–12: Implement secure default configurations; build OTA signing and secure boot; start internal testing regime; draft incident response plan.

• Months 12–24: Integrate supply-chain attestations; run third-party penetration tests for key products; finalize documentation and user guidance.

• Months 24–36: Complete certifications/independent audits for high-risk products; operationalize incident reporting to meet CRA timelines; public labeling and support commitments.

Final checklist before December 11, 2027

• Product classification documented.

• SBOM and component provenance in place.

• Signed, authenticated OTA update capability with rollback and staged rollout.

• Vulnerability management and incident reporting workflows tested.

• Security testing and third-party audit evidence for higher-risk products.

• Clear user-facing security documentation and defined support lifetimes.

• Contracts updated with suppliers/distributors to reflect responsibilities.

Closing

Treat CRA readiness as an investment in product trust and market access. Start with product classification, secure update and SBOM programs, then operationalize incident reporting and long-term support. These concrete steps will both reduce risk and make compliance auditable well before the 2027 deadline.

Secure Your systems, Before Attackers Do!