PWND BLASTER: HACKING YOUR PC USING YOUR SPEAKER WITHOUT EVER TOUCHING IT

Summary from the TLDR InfoSec newsletter

The Creative Sound Blaster Katana V2X soundbar accepts unauthenticated Bluetooth connections and exposes its proprietary CTP control protocol over BLE. Firmware updates also use CTP and verify only a trivial SHA-256 checksum, allowing an attacker within ~15 meters to install custom firmware without pairing or physical access. The modified firmware adds a full USB keyboard HID descriptor and repurposes an existing diagnostic task to type commands after boot, turning the speaker into a remote BadUSB device. A proof-of-concept payload waits ~20 seconds for USB to initialize, then types echo pwned and presses Enter on the connected PC. Bluetooth stays enabled in sleep mode with no user-accessible toggle. Creative initially declined to classify this as a vulnerability.