CVE-2026-77056 Details
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.
A vulnerability exists in boneIO black_debian_images due to the Mosquitto MQTT broker using the same default credentials on all devices. These credentials are publicly available and there is no guidance to change them. This allows remote attackers to gain full read and write access to the broker, control connected relays, blinds, and gates, and inject fake entities into a Home Assistant installation. The issue affects boneIO Black versions 1.2.0 prior to 1.6.0.
Users can upgrade to boneIO Black version 1.6.0, which generates unique MQTT passwords per device at first boot. However, devices upgraded from earlier versions will retain their existing broker credentials. After upgrading, the web panel will display the default credentials, which must be manually changed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 26, 2026CISA-ADP
Assessed Oct 26, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://boneio.eu/en/docs/black | [email protected] | Vendor |
| https://cert.pl/en/posts/2026/10/CVE-2026-77052 | [email protected] | AdvisoryBundleRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-1392 | Use of Default Credentials | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| boneIO black_debian_images | >= 1.2.0, <= 1.6.0 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 26, 2026 | CVE Modified | CISA-ADP |
| Oct 26, 2026 | New CVE Received | [email protected] |