What is CVE-2026-76639?
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.
Affected product
See advisory
Remediation Steps
- Apply vendor security update for Unitree G1 EDU
- Restrict network access to affected robots to trusted networks
- Disable Bluetooth Low Energy (BLE) if not required for operations
- Monitor robot systems for unauthorized access or anomalous behavior
References
Referenced in our briefings & reports
- Vulnerability Priority Report – Week 4 of August 2026 (August 24 – 30)
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🤖 This CVE page is generated by defend.network from NVD, CISA KEV, EPSS, and our verified daily briefings. Severity and exploitation data come from official sources; always verify remediation steps against the official vendor advisory before acting in production.