CVE-2026-77056
Use of Default Credentials in boneIO
- State
- Published
- Severity
- 7.1 High
- Published
- Oct 26, 2026
- Updated
- Oct 26, 2026
- Reserved
- Aug 20, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.1 High | CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N | CERT-PL |
Weaknesses
- CWE-1392 Use of Default Credentials
Affected Products
| Product | Versions |
|---|---|
black_debian_imagesboneIO |
|
References
- https://cert.pl/en/posts/2026/10/CVE-2026-77052third-party-advisory
- https://boneio.eu/en/docs/blackproduct
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