Root code execution via BLE buffer overflow
Published Aug 27, 2026 · Updated Aug 27, 2026
Remote code execution in Unitree Robotics G1 EDU firmware through 1.5.2 allows physically proximate attackers to run commands as root over BLE. The btgatt-server SSID chunk accumulator writes across a fixed BSS buffer, corrupting an adjacent mainloop cleanup function pointer that invokes system() with attacker-controlled data. Exploitation requires BLE proximity but no pairing or credentials, and the dispatched command runs with uid 0.
Summary
What happened
Remote code execution in Unitree Robotics G1 EDU firmware through 1.5.2 allows physically proximate attackers to run commands as root over BLE. The btgatt-server SSID chunk accumulator writes across a fixed BSS buffer, corrupting an adjacent mainloop cleanup function pointer that invokes system() with attacker-controlled data. Exploitation requires BLE proximity but no pairing or credentials, and the dispatched command runs with uid 0.
The record
- CVE
- CVE-2026-76640
- Published
- Aug 27, 2026
- Updated
- Aug 27, 2026
- Vendor
- Unitree Robotics
- Product
- G1 EDU
- Classifications
- CWE-306, CWE-787, T1059.004
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 27, 2026CVE publishedPublication date reported by the CVE source.
- Aug 27, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=1.5.2
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- UniBLEed full BLE-to-root chainfunctional · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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