CVE-2026-76639 | defend.network

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.

CVSS8.8 NVD 3.1

SeverityHIGH

ExploitationNo exploitation reported

EPSS1% · P51

Triage statusNo Known Exploit

ActionPatch this week

CVSS vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWECWE-22

NVD published2026-08-27

NVD last modified2026-09-08

Timeline

2026-08-27Published to the U.S. National Vulnerability Database (NVD)
2026-09-08NVD record last updated

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.