# CVE-2026-76640: Unitree G1 EDU 1.5.2 BLE GATT RCE via WiFi Provisioning Stack

> Unauthenticated attackers can achieve root code execution on Unitree G1 EDU robots via BLE GATT buffer overflow and command injection in WiFi provisioning.

- **Severity:** High 7.7 (`CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 27 Aug 2026
- **Updated:** 28 Aug 2026
- **Also known as:** GHSA-4qj2-mfrv-5fm4

## What is CVE-2026-76640?

CVE-2026-76640 is a high-severity memory corruption 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 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.

Weakness: CWE-787 (Out-of-bounds Write), CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2026-76640?


## How do I fix CVE-2026-76640?

No fix has been published for CVE-2026-76640 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-76640 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-76640 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-76640 and fix it if it is affected.

What it is: CVE-2026-76640 is a high-severity memory corruption 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.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-76640 exists.

Affected product: Unitree Robotics G1 EDU. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-76640/ (Markdown: https://insights.sbomify.com/CVE-2026-76640/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-76640
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-76640
- OSV: https://osv.dev/vulnerability/CVE-2026-76640

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-76640/
Summaries are generated and may contain mistakes; the official description above is the record.