CVE-2026-76640 | defend.network

What is CVE-2026-76640?

Unitree G1 EDU firmware through 1.5.2 contains multiple chained vulnerabilities in the BLE GATT server and WiFi provisioning stack that allow unauthenticated proximate attackers to achieve root code execution without pairing or credentials by exploiting an unquoted heredoc variable in the WiFi provisioning script and a buffer overflow in the SSID chunk accumulator. Attackers can send crafted BLE writes to overflow a fixed BSS buffer across BLE connections, corrupting an adjacent mainloop function pointer dispatch entry that is subsequently invoked by the cleanup path passing attacker-controlled data to system() as uid 0.

CVSS7.5 NVD 3.1

SeverityHIGH

Exploitation In the wild

EPSS<1% · P26

Triage statusActive Exploit

ActionPatch within 48 hours

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

CWECWE-306

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 Bluetooth Low Energy (BLE) access to authorized devices only
Audit robot system logs for unauthorized root access attempts
Consider disabling unnecessary wireless interfaces if operationally feasible

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.