# CVE-2026-27509 — Unitree Go2 Firmware

> As of 2026-05-26, CVE-2026-27509 is a HIGH-severity vulnerability in Unitree Go2 Firmware, CVSS v3.1 8, EPSS 0.4% (38.7th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-27509, most recently “US FCC Bans Imported Advanced Robots Over Supply-Chain Risk and UniPwn-Class Takeover Vulnerabilities (CVE-2025-35027)”.

**Last updated:** 2026-05-26

## What is CVE-2026-27509?

Unitree Go2 firmware versions V1.1.7 through V1.1.9, and V1.1.11 (EDU) do not implement DDS authentication or authorization for the Eclipse CycloneDDS topic rt/api/programming_actuator/request handled by actuator_manager.py. A network-adjacent, unauthenticated attacker can join DDS domain 0 and publish a crafted message (api_id=1002) containing arbitrary Python, which the robot writes to disk under /unitree/etc/programming/ and binds to a physical controller keybinding. When the keybinding is pressed, the code executes as root and the binding persists across reboots.

The record classifies CVE-2026-27509 under weakness class [CWE-306](https://intel.threadlinqs.com/cwe/CWE-306). Its CVSS v3 base vector states that the flaw is reachable from an adjacent network, needs no prior authentication, needs a user to take an action first, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 221 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 8 — HIGH (`CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **CVSS v4.0 base score:** 8.5 (`CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **EPSS (FIRST):** 0.4% probability of exploitation in the next 30 days, higher than 38.7% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 7.6/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-02-26, last modified 2026-05-26

## Is CVE-2026-27509 being exploited?

Weaponised exploit code for CVE-2026-27509 is publicly available. 1 public proof-of-concept repository is tracked for this identifier.

- [trickest/cve](https://github.com/trickest/cve/blob/main/2026/CVE-2026-27509.md) (trickest)

## Affected products and versions

- **UnitreeRobotics**: Unitree Go2

## How to fix CVE-2026-27509

No vendor patch reference has been recorded for CVE-2026-27509 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-27509

1 tracked threat in the Threadlinqs corpus references CVE-2026-27509, either in the campaign’s CVE list or as an indicator on the campaign record.

- [US FCC Bans Imported Advanced Robots Over Supply-Chain Risk and UniPwn-Class Takeover Vulnerabilities (CVE-2025-35027)](https://intel.threadlinqs.com/threat/TL-2026-1751) — HIGH · 2026-07-29

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories, public proof-of-concept repositories. Last verified by Threadlinqs on 2026-07-29. This product uses the NVD API but is not endorsed or certified by the NVD.

**Exploit and proof of concept**

- [boschko.ca — technical description](https://boschko.ca/unitree-go2-rce/)

**Third-party advisory**

- [vulncheck.com — third party advisory](https://www.vulncheck.com/advisories/unitree-go2-missing-dds-authentication-enables-adjacent-rce)

**Issue tracking and product pages**

- [shop.unitree.com — product](https://shop.unitree.com/products/unitree-go2)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-27509
Full detection coverage and IOCs for threats exploiting CVE-2026-27509 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp