What is the CVSS score of CVE-2026-27509?

CVE-2026-27509 has a CVSS 4.0 base score of 8.5 (High). CVSS vector: 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 exploitation probability: 0.0%.

Is there a public PoC exploit available for CVE-2026-27509?

Yes, a public proof-of-concept exploit is available for CVE-2026-27509. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-27509?

Within 24 hours: Inventory all Unitree Go2 robots and identify those running V1.1.7-V1.1.9 or V1.1.11 (EDU); isolate affected units from production networks and document their locations. Within 7 days: Restrict network access to affected robots using firewall rules to block DDS traffic on port 7400 (or relevant CycloneDDS ports) from untrusted networks; implement network segmentation to limit robot communication to trusted administrative subnets only. Within 30 days: Monitor vendor advisory channels for firmware patches; establish a testing environment to validate patches before deployment; develop a phased rollout plan for firmware updates across all affected units.

Go2 Firmware CVE-2026-27509

HIGH

Missing Authentication for Critical Function (CWE-306)

2026-02-26 disclosure@vulncheck.com

Authentication Bypass Python Go2 Edu Firmware Go2 Firmware Unitree

8.5

CVSS 4.0 · NVD

View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Join DDS domain 0 without authentication
Delivery

Publish crafted message to rt/api/programming_actuator/request topic
Exploit

Write arbitrary Python code to /unitree/etc/programming/
Execution

Bind code to physical controller keybinding
Impact

Press keybinding to execute code as root

Vulnerability Assessment

Weakness	CWE CWE-306 OWASP Top 10:2025 A07:2025 - Authentication Failures ASVS 5.0 V6 - Authentication Authentication required for critical functions MITRE ATT&CK 1 technique across 1 tactic: Initial Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Exploitation Conditions	Network-adjacent access to Eclipse CycloneDDS domain 0 on Unitree Go2 robot running firmware V1.1.7-V1.1.9 or V1.1.11 (EDU); DDS authentication disabled on rt/api/programming_actuator/request topic; user interaction required to press the bound controller keybinding.
Impact	CVSS 8.0 (HIGH). Attack vector: Adjacent Network. Complexity: Low. Privileges required: None. User interaction: Required. Exploitation no authentication required. Exploitable via remote/network. Public exploit/POC available.
Exploit ScenarioDerived	A remote attacker without authentication could exploit this vulnerability to compromise the affected system.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Unitree Go2 robots running firmware versions V1.1.7-V1.1.9 and V1.1.11 (EDU) lack authentication controls on the DDS actuator API, allowing network-adjacent attackers to inject and execute arbitrary Python code as root by publishing a crafted message. Public exploit code exists for this vulnerability, which enables persistent code execution through controller keybindings that survive reboots. No patch is currently available.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 21:56 CVSS 8.0

RemediationAI

Monitor vendor advisories for a patch.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Classified as CWE-306 (Missing Authentication for Critical Function). Affects Go2 Firmware. 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 pre

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 8.5 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Adjacent

Attack Complexity

Low

Attack Requirements

None

Privileges Required

None

User Interaction

Active

Vulnerable system: Confidentiality

High

Vulnerable system: Integrity

High

Vulnerable system: Availability

High

Subsequent system: Confidentiality

None

Subsequent system: Integrity

None

Subsequent system: Availability

None

Lifecycle Timeline

CVSS changed

May 26, 2026 - 14:22 NVD

8.0 (HIGH) 8.5 (HIGH)

PoC Detected

Mar 12, 2026 - 20:17 vuln.today

Public exploit code

CVE Published

Feb 26, 2026 - 20:31 nvd

HIGH 8.0

DescriptionCVE.org

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.

Executive ViewAI

Why It Matters

Unitree Go2 robots running affected firmware versions contain a critical authentication bypass in their control interface, allowing unauthorized remote manipulation of robotic actuators without credentials. Organizations deploying these robots in production environments face immediate risk of unauthorized device control, potential physical harm, and operational disruption until firmware patches are available.

Business Impact: High

Compensating Controls

Implement network-layer isolation: segment robot networks from general corporate networks using VLANs or air-gapping; deploy firewall rules to restrict DDS topic access (rt/api/programming_actuator/request) to authorized administrative hosts only; disable remote programming/actuator control features if not operationally required; monitor network traffic for unauthorized DDS connections using IDS/IPS; restrict physical access to network connections on affected robots; require manual code review and approval for any actuator commands until patches are deployed.

Threat Intelligence Overview

EPSS Score

0.0%

Top 89% exploitable

Exploit

POC

Public exploit code exists

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC Yes

EPSS 0.0%

Patch available No

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.