Final answer:
A security risk of an embedded system that is not commonly found in a standard PC is control of a mechanism in the physical world.
Step-by-step explanation:
An embedded system is a combination of hardware and software designed to perform specific functions. It is commonly found in everyday objects like appliances, vehicles, and medical devices. One security risk of an embedded system that is not commonly found in a standard PC is control of a mechanism in the physical world.
An embedded system can have direct control over physical systems, such as controlling the temperature in a room or opening and closing doors. This creates a potential security risk if unauthorized access is gained to the embedded system, as an attacker could manipulate or disrupt the physical systems.
For example, if an embedded system controls the security system of a building, an unauthorized individual who gains access to the embedded system could disable the security system, allowing unauthorized access to the building. This risk of physical harm or property damage is unique to embedded systems and not commonly found in standard PCs.