Final answer:
The attack where confidential data was stolen from a smartphone using Bluetooth is known as bluesnarfing. This technique gives attackers unauthorized access to the device's information.
Step-by-step explanation:
Nyla is investigating a security incident where confidential data was stolen from the CEO's smartphone through a potential Bluetooth attack. The correct term for such an attack is bluesnarfing
Bluesnarfing is a method by which unauthorized individuals gain unauthorized access to a device through its Bluetooth connection to extract information. This is different from bluejacking, which involves sending unsolicited messages to Bluetooth-enabled devices, and blueswiping or bluestealing, which are not commonly recognized terms in the context of Bluetooth security.