Vulnerability Description
boneIO black_debian_images ships with a Mosquitto MQTT broker that uses the same default credentials on all devices. These credentials are publicly documented on github, and there is no indication in the instructions to change them. A remote attacker can use them to gain full read and write access to the broker, allowing control of connected relays, blinds, and gates, and injection of fake entities into a linked Home Assistant installation. This issue was fixed in version 1.6.0 of the image: MQTT passwords are generated per device at first boot. Devices upgraded from earlier versions keep their existing broker credentials; from boneio 1.6.0 the web panel reports credentials that are still the published defaults, and the owner has to change them.
Related Weaknesses (CWE)
References
FAQ
What is CVE-2026-77056?
CVE-2026-77056 is a documented vulnerability. boneIO black_debian_images ships with a Mosquitto MQTT broker that uses the same default credentials on all devices. These credentials are publicly documented on github, and there is no indication in ...
How severe is CVE-2026-77056?
CVSS scoring is not yet available for CVE-2026-77056. Check NVD for updates.
Is there a patch for CVE-2026-77056?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.