Yes, it is possible to remotely control or obtain sensitive information by modifying or hacking the firmware of an electronic device. This operation is often referred to as firmware attack or firmware implantation. Firmware is the underlying software layer of the device hardware that controls the basic operation of the device, so malicious modification of it can lead to serious security risks. Here are some possibilities and methods: 1. **Remote control**: An attacker may implant malicious code through firmware updates to gain control of the device. In this case, the firmware update channel provided by the device manufacturer may become an attack entry point if it is not secure. 2. **Access to sensitive information**: Firmware can access all kinds of data in the device, including stored data, network traffic, etc., so attackers can steal sensitive information by modifying the firmware. 3. **Persistence attack**: Because firmware is at the bottom of the system, traditional security software and system updates are usually difficult to detect or remove malicious code in firmware, which allows attackers to have persistent control of the device. 4. **Physical access or initial intervention**: Some attacks require physical access to the device, or malicious firmware is implanted when the device is first shipped through supply chain attacks. To protect devices from such attacks, the following measures are recommended: - Always use official firmware and updates provided by the device manufacturer. - Ensure the integrity and confidentiality of the update process to prevent tampering. - Use trusted security software for anomaly detection. - If possible, enable the device's secure boot feature to prevent unauthorized firmware from loading. This type of attack is very complex, usually targeted, and requires considerable technical capabilities and resources.