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Freedom251 › Blog › Cyber Resilience Act

Cyber Resilience Act for Firmware and IoT: Key Duties, Deadlines and Support Rules

By Freedom251 Team · · 9 min read

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The EU Cyber Resilience Act (CRA), Regulation (EU) 2024/2847, changes firmware and IoT compliance from a launch-time security exercise into a lifecycle obligation. A connected product may be covered if it is a “product with digital elements,” but scope depends on the product’s legal classification and any applicable exclusion. Manufacturers must therefore make two assessments: whether the product is in scope, and what risk-based security controls, support commitments and reporting processes its design requires.

The law is already in force, but it applies in stages. Article 14 vulnerability and incident reporting duties started on 11 September 2026. The CRA generally applies from 11 December 2027, with a separate transition rule for products already on the market. Firmware and IoT teams should treat the period before 2027 as implementation time, not as a reason to defer preparation.

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What the Cyber Resilience Act changes for firmware and IoT

The CRA is a horizontal EU regulation for products with digital elements. That category can include connected hardware, embedded software, firmware, devices that process data, and software products whose security affects a product’s operation. It does not mean that every connected device is automatically covered. The manufacturer must confirm the product’s legal category, check exclusions and consider interactions with sector-specific EU legislation.

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For an in-scope product, the principal change is that cybersecurity becomes a product property and a continuing manufacturer duty. The product must be designed and produced to achieve an appropriate cybersecurity level based on risk. Separately, the manufacturer must maintain vulnerability-handling, update and support processes throughout the declared support period.

“Products with digital elements shall be designed, developed and produced in such a way that they ensure an appropriate level of cybersecurity based on the risks.”

Regulation (EU) 2024/2847, Annex I, Part I, point 1

The regulation does not prescribe one universal architecture, programming language, coding standard or test suite. Compliance depends on how the manufacturer assesses the product’s risks and demonstrates that the applicable outcomes have been addressed.

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First decide whether the product is in scope

Map the product, firmware and services

Start with the complete item placed on the EU market: hardware, bootloader, operating firmware, update mechanism, companion software and any cloud or network function that is part of the product’s operation. Record who places each element on the market and which entity is the legal manufacturer.

Check exclusions and sector rules

Do not rely on the informal label “IoT.” Confirm whether the item is a product with digital elements under the CRA and whether an exclusion applies. Some products may also be governed by sectoral EU legislation with its own cybersecurity requirements. A product-specific legal review is needed where classification or overlap is uncertain.

Document the decision

Keep a written scope assessment covering the product description, digital components, intended use, EU market activity, relevant exclusions and sector legislation. Revisit it when a product line, firmware function or distribution model changes. The scope record will also help determine which transition rule applies.

Risk-based security requirements at product level

Annex I attaches security outcomes to the product itself. The manufacturer’s risk assessment should connect threats, likely misuse, affected assets and mitigations to concrete design decisions. The following requirements are the most significant for firmware and connected-device engineering.

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No known exploitable vulnerabilities at market placement

Where applicable, the product must be made available without known exploitable vulnerabilities. This requires a release gate that considers open vulnerability information, unresolved supplier issues, exploitable configurations and the effectiveness of compensating controls. A statement that testing occurred is not, by itself, evidence that a known exploitable weakness has been addressed.

Secure-by-default configuration

Where applicable, products must use secure-by-default settings. Examples include disabling unnecessary services, requiring appropriate authentication, limiting privileges and avoiding exposed administrative interfaces unless the risk assessment justifies them. If a less secure mode is necessary for a documented use case, the product should make the security consequences clear and require an intentional choice rather than silently shipping the weaker setting.

Reset and recovery

Users should be able to reset the product to its original state. For firmware teams, this means defining what “original state” contains, protecting reset operations from unauthorized use and ensuring that credentials, keys, personal data and configuration do not survive a reset in an unsafe way. Recovery procedures should also account for interrupted updates and loss of power.

Protection of data and essential functions

The annex addresses access control, confidentiality and integrity of data, and availability of essential functions. Translate those outcomes into requirements for authentication, authorization, key storage, secure communications, input validation, logging, fail-safe behavior and resilience against denial-of-service conditions. The controls should match the product’s risk and operating environment rather than being copied from an unrelated device.

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Security updates and user control

Security updates must be supported. Where the regulation’s conditions make automatic installation applicable, the update experience must include notice and an opt-out, together with a way to postpone installation temporarily. Design the update channel for authenticity, integrity, rollback protection and recovery from interrupted installation. Explain update status and required user action in language appropriate to the product’s audience.

What changes in the firmware development lifecycle

Make security requirements traceable

For each product, connect the risk assessment to architecture decisions, security requirements, verification evidence and release approval. A traceability record should show why a control exists, which component implements it, how it was tested and what residual risk remains. This is more useful than a generic checklist because the CRA’s standard is risk-based.

Test and review security regularly

Manufacturers must test and review security regularly. Plan testing across the product lifecycle: design reviews, code analysis, dependency checks, interface and protocol testing, update-path testing, penetration testing where justified, and regression testing after remediation. Repeat the review when the threat environment, major dependencies or product functions change.

Separate security updates where technically feasible

Security updates should be separate from functionality updates where technically feasible. A separated security path reduces the time and risk associated with urgent remediation and lets customers receive a fix without accepting unrelated feature changes. If technical constraints require a combined package, document the reason and test the larger change carefully.

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SBOM and vulnerability-handling duties

Maintain a machine-readable SBOM

Manufacturers must identify and document the components and vulnerabilities in their products, including through a software bill of materials. The SBOM must be in a commonly used, machine-readable format and cover at least top-level dependencies. “Top-level” coverage is a minimum, not a reason to ignore deeper transitive components that can introduce exploitable code.

Keep the SBOM synchronized with release artifacts. Record component names and versions, build or release identifiers and the relationship between firmware images and dependencies. A process that generates an SBOM once but does not update it for each release will not support reliable vulnerability response.

Operate a vulnerability intake process

Provide a practical channel for receiving vulnerability reports, triage incoming information, assign ownership and preserve a decision record. The process should distinguish a suspected issue from a confirmed vulnerability, assess exploitability and product impact, identify affected versions and define a remediation owner.

Remediate without delay

The CRA requires manufacturers to address and remediate vulnerabilities without delay, including through security updates. “Without delay” is a process obligation, not a permission to wait for the next planned feature release. Prioritize issues by exploitability and impact, prepare mitigation where a full fix cannot be released immediately, and retain evidence of decisions, testing and release communication.

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Tell users what an update fixes

Manufacturers must provide accessible information about vulnerabilities fixed by an update, subject to the regulation’s conditions and limited grounds for delaying disclosure. Release notes should identify affected versions, the security impact in understandable terms, the fixed version, installation instructions and any temporary mitigation. Coordinate disclosure timing with remediation and reporting duties.

How long must security updates be provided?

The CRA does not establish one universal support duration for every product. The manufacturer sets a support period that reflects the product’s expected use. The regulation points to reasonable user expectations and the product’s nature, including its purpose.

When setting the period, consider:

  • How long users would reasonably expect the product to remain in service.
  • The product’s purpose, safety relevance and operating environment.
  • Comparable products and normal market practice.
  • Whether operating-system, platform or network support remains available.
  • Support for core third-party components on which the product depends.
  • Relevant technical or regulatory guidance.

Publish the resulting support commitment clearly and align it with the update process, vulnerability intake channel and end-of-support communications. Do not substitute a convenient company policy, such as a generic two-year period, for the product-specific rationale required by the regulation.

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Reporting actively exploited vulnerabilities and severe incidents

Article 14 requires manufacturers to report through the single reporting platform simultaneously to the designated coordinating CSIRT and ENISA. The deadlines run from the manufacturer’s awareness, so monitoring, escalation and time-stamped incident records are essential.

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Actively exploited vulnerability

Required communication Deadline What it should accomplish
Early warning Without undue delay and no later than 24 hours after awareness Alert the coordinating CSIRT and ENISA that an actively exploited vulnerability exists.
Vulnerability notification No later than 72 hours after awareness Provide substantive information about the vulnerability and affected product.
Final report No later than 14 days after a corrective or mitigating measure becomes available Describe the response, measure and relevant outcome.

The statutory wording is explicit: “A manufacturer shall notify any actively exploited vulnerability contained in the product with digital elements that it becomes aware of simultaneously to the CSIRT designated as coordinator, in accordance with paragraph 7 of this Article, and to ENISA.”

Severe incident affecting product security

Required communication Deadline
Early warning No later than 24 hours after awareness
Incident notification No later than 72 hours after awareness
Final report Within one month after the incident notification

Prepare a single incident playbook that identifies the reporting owner, legal and technical approvers, CSIRT and ENISA submission route, evidence requirements, customer communications and update-release workflow. The playbook must distinguish an actively exploited vulnerability from a severe incident because the final-report deadlines differ.

CRA application dates and transition rules

Date What applies
11 June 2026 Chapter IV provisions concerning conformity assessment bodies apply.
11 September 2026 Article 14 reporting obligations apply. These duties are already in force as of 13 October 2026.
11 December 2027 The CRA generally applies.

For products placed on the market before 11 December 2027, the general transition applies the CRA after that date only if a substantial modification occurs. Article 14 has a separate transition: its reporting duties apply to in-scope products placed on the market before 11 December 2027. Therefore, an older product can be outside the general post-2027 obligations while still requiring Article 14 reporting when the reporting conditions are met.

A practical implementation plan for firmware and IoT teams

  1. Build the scope register. List each product, firmware branch, digital service and market version. Record the legal manufacturer, intended use, EU availability and any possible exclusion or sector-law interaction.
  2. Set the risk baseline. Identify assets, threats, attack surfaces, essential functions and likely consequences. Convert the assessment into product security requirements.
  3. Create release gates. Check known exploitable vulnerabilities, secure defaults, authentication, data protection, update integrity, reset behavior and availability before market placement.
  4. Automate SBOM production. Generate a machine-readable SBOM for every releasable firmware image and retain it with the build and signing records. Ensure at least top-level dependencies are covered.
  5. Connect intake to remediation. Define report channels, severity criteria, ownership, emergency mitigation, patch testing, release approval and user-facing disclosure.
  6. Set and justify the support period. Base it on expected use, user expectations, product nature, comparable products, operating environment and third-party component support. Publish the commitment.
  7. Exercise the reporting clock. Run a tabletop scenario that starts when an actively exploited vulnerability or severe incident becomes known. Verify that the 24-hour, 72-hour, 14-day and one-month milestones can be met.
  8. Review transition exposure. Identify products already on the market, planned substantial modifications and reporting obligations that apply before general CRA application.

Common mistakes to avoid

  • Treating “IoT” as a legal conclusion: connected-device marketing language does not replace a product-by-product scope analysis.
  • Promising a fixed support term: the CRA requires a reasoned period reflecting expected use; it does not impose one universal number.
  • Stopping at an SBOM export: an SBOM is useful only when it is current, machine-readable and connected to vulnerability triage.
  • Combining every update by default: separate security updates from functionality updates where technically feasible.
  • Waiting for 2027 to build reporting capability: Article 14 already applies, including to relevant products placed on the market before 11 December 2027.
  • Assuming a test method guarantees compliance: no single coding practice, architecture or test establishes the required risk-based outcome for every product.
  • Ignoring reset and default settings: secure defaults and safe recovery are product requirements, not documentation-only features.

What manufacturers should be able to show

By the time the general application date arrives, a manufacturer should be able to show a coherent evidence chain: a documented scope decision; a product risk assessment; security requirements and design records; test and review results; release checks for known exploitable vulnerabilities; a current SBOM; vulnerability intake and remediation records; a support-period rationale; update and disclosure procedures; and an exercised Article 14 reporting playbook.

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The strongest implementation treats these as one operating system for product security rather than separate compliance documents. Engineering owns the controls, product management owns the support commitment, security teams own vulnerability response, and compliance leads ensure that evidence and deadlines remain aligned across every firmware version.

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Cyber Resilience ActEU cybersecurity lawfirmware securityIoT securityproduct complianceSBOMvulnerability management

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