CVE-2026-77056 boneIO black_debian_images - Authentication Bypass

boneIO black_debian_images before 1.6.0 contains a broken authentication caused by use of default MQTT broker credentials, letting remote attackers gain full read/write access to the broker and control connected devices, exploit requires use of default credentials.

CVSS base score 7.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Broken Authentication
CVSS vector
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
26 October 2026
Updated
27 October 2026
Weakness
CWE-1392

Vendor fix

Update to version 1.6.0 or later where MQTT passwords are generated per device at first boot.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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