Summary

• ENISA has published a secure by design and secure by default playbook for SMEs.
• The guidance turns broad security principles into repeatable engineering, product, and release actions.
• The work supports smaller suppliers preparing for Cyber Resilience Act expectations.

ENISA has published a secure by design and secure by default playbook for small and medium-sized enterprises, giving smaller technology suppliers a more practical route into Europe’s product security regime.

The European Union Agency for Cybersecurity says modern products with digital elements are now expected to be secure by design and secure by default, but smaller organisations can struggle to apply those ideas consistently. Its new guide is intended to turn the principles into clear, repeatable actions across product lifecycles.

The publication follows ENISA’s wider work on SME readiness for the Cyber Resilience Act, including guidance on cyber resilience maturity and survey work on how smaller organisations are preparing for the regulation. The new playbook focuses more tightly on how security decisions are made during engineering, product planning, release, and maintenance.

That practical emphasis is important because the Cyber Resilience Act moves security duties further upstream. Connected products, software, components, and update mechanisms cannot be treated as finished items that receive security checks only at the end of development. Security must be built into requirements, architecture, testing, defaults, vulnerability handling, documentation, and support processes.

Larger vendors may already have product assurance teams, compliance functions, threat modelling processes, and formal release controls. Many smaller suppliers do not. Yet those suppliers often sell into enterprise and public sector supply chains, where buyers will increasingly ask for evidence of secure development, vulnerability management, software component visibility, and defensible defaults.

The guide therefore belongs to a wider shift in cyber regulation. Europe is moving from asking organisations to secure themselves towards asking technology suppliers to reduce the downstream risk their products create. That approach reflects the reality of modern software supply chains, where one weak component or badly maintained connected product can expose thousands of organisations.

ENISA’s guidance does not remove the cost of compliance, and some SMEs will still need external help to turn the playbooks into working governance. Even so, the publication gives smaller companies a clearer structure for what buyers, regulators, and notified bodies are likely to expect as product security becomes a commercial requirement.

Security by design has often been used as a phrase broad enough to mean almost anything. ENISA’s SME playbook narrows the field by tying it to everyday product decisions. That is where the Cyber Resilience Act will either become an engineering habit or another compliance file maintained separately from how software is actually built.