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Two Unitree G1 EDU Humanoid Robot Flaws Enable Root RCE, One Starts Over Bluetooth
Researcher disclosed two root RCE chains in Unitree G1 EDU robots (CVE-2026-76639, CVE-2026-76640), one reachable via unpaired Bluetooth, with no confirmed fixed firmware.
Security researcher Olivier Laflamme disclosed two independent root remote code execution chains in the Unitree G1 EDU robot: CVE-2026-76639, a network-adjacent path through chat_go and bashrunner, and CVE-2026-76640, a Bluetooth Low Energy path that ends with a 1,050-byte buffer overflow in btgatt-server giving root on the Locomotion PC. The BLE chain also exploits a cloud authorization gap that let any valid Unitree account recover another robot's AES key, then forces the robot onto an attacker hotspot via wpa_connect.sh heredoc injection. Unitree patched the cloud ownership check in July 2026, but no confirmed fixed firmware release addresses the BLE issues; the PoC was limited to two robots in one room and no in-the-wild exploitation is reported.
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Hack One Robot, Reach the Next: Unitree G1 Security Flaws
Researcher chained two Unitree G1 flaws (CVE-2026-76639, CVE-2026-76640) to gain unauthenticated root access, with compromised robots able to infect others via Bluetooth.
Security researcher Olivier Laflamme chained a path-traversal file-write flaw (CVE-2026-76639) in the G1 chatbot service and a Bluetooth server buffer overflow (CVE-2026-76640) to achieve unauthenticated root access remotely. The chain abuses Unitree's cloud API as a decryption oracle for the AES-128 key that unlocks BLE and WebRTC channels, and a compromised robot can propagate the attack to nearby G1 units. Unitree patched the cloud ownership-check flaw, paid a $5,000 bounty, and firmware fixes for BLE pairing and the buffer overflow remain harder to deliver.
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