How severe is CVE-2026-27509?

CVE-2026-27509 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-27509 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27509?

CVE-2026-27509 primarily affects Unitree Go2 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-27509?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-27509 have an EU (EUVD) identifier?

Yes. CVE-2026-27509 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8881.

When was CVE-2026-27509 published?

CVE-2026-27509 was published on 2026-02-26 and last updated on 2026-06-17.

CVE-2026-27509

CVE-2026-27509 is a high-severity vulnerability in Unitree Go2 Firmware with a CVSS 3.x base score of 8.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-306.

Key facts

Severity: High (CVSS 3.x base score 8.0)
CVSS v4: 8.5
EPSS exploit prediction: 0% (38th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-8881
Weakness: CWE-306
Affected product: Unitree Go2 Firmware
Published: 2026-02-26
Last modified: 2026-06-17

Description

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.

Frequently asked questions

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.
How severe is CVE-2026-27509?: CVE-2026-27509 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-27509 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27509?: CVE-2026-27509 primarily affects Unitree Go2 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-27509?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-27509 have an EU (EUVD) identifier?: Yes. CVE-2026-27509 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8881.
When was CVE-2026-27509 published?: CVE-2026-27509 was published on 2026-02-26 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:o:unitree:go2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:unitree:go2_edu_firmware:1.1.11:*:*:*:*:*:*:*

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