CVE-2026-76639 Unitree G1 EDU 1.5.2 Unauthenticated RCE via DDS Bridge and Path Traversal
Network-adjacent attackers can execute arbitrary commands as root on Unitree G1 EDU robots by chaining unauthenticated DDS access, weak cryptography, and path traversal.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-76639?
CVE-2026-76639 is a high-severity path traversal vulnerability in Unitree Robotics G1 EDU, published on 27 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Unitree G1 EDU firmware through 1.5.2 contains an unauthenticated remote code execution vulnerability that allows network-adjacent attackers to execute arbitrary commands as root by chaining three weaknesses: an unauthenticated WebRTC-to-DDS bridge on TCP port 9991, a static AES-128 key stored with world-readable permissions, and a path traversal flaw in the chat_go knowledge upload API. Attackers can publish DDS control messages to restart the bashrunner service, plant a malicious payload in its script execution directory via path traversal, and trigger execution of that payload as uid 0 through the bashrunner shell subprocess.
Which versions are affected by CVE-2026-76639?
How do I fix CVE-2026-76639?
No fix has been published for CVE-2026-76639 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-76639 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-76639 exists.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-q24f-vr89-8h97.