As is the case for physical repairs or modifications, a product with digital elements should be considered to be substantially modified by a software change where the software update modifies the intended purpose of that product and those changes were not foreseen by the manufacturer in the initial risk assessment, or where the nature of the hazard has changed or the level of cybersecurity risk has increased because of the software update, and the updated version of the product is made available on the market. Where a security update which is designed to decrease the level of cybersecurity risk of a product with digital elements does not modify the intended purpose of a product with digital elements, it is not considered to be a substantial modification. This usually includes situations where a security update entails only minor adjustments of the source code. For example, this could be the case where a security update addresses a known vulnerability, including by modifying functions or the performance of a product with digital elements for the sole purpose of decreasing the level of cybersecurity risk. Similarly, a minor functionality update, such as a visual enhancement or the addition of new pictograms or languages to the user interface, should not generally be considered to be a substantial modification. Conversely, where a feature update modifies the original intended functions or the type or performance of a product with digital elements and meets the above criteria, it should be considered to be a substantial modification, as the addition of new features typically leads to a broader attack surface, thereby increasing the cybersecurity risk. For example, this could be the case where a new input element is added to an application, requiring the manufacturer to ensure adequate input validation. In assessing whether a feature update is considered to be a substantial modification it is not relevant whether it is provided as a separate update or in combination with a security update. The Commission should issue guidance on how to determine what constitutes a substantial modification.
This recital provides context for:
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