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CVE-2026-77056

Use of Default Credentials in boneIO

Products / packages boneIO black_debian_images

Published

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Severity and exploitation

Not in CISA KEV

KEV coverage does not rule out exploitation.

KEV checked 15/11/2026, 00:30:33 UTC
CERT-PL · CVSS:4.0 · 7.1
Assessment vectorCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Severity

high7.1

CVSS measures technical severity, not the likelihood of an attack.

Known exploitation

Not listed in the checked CISA KEV catalog

Absence from CISA KEV does not rule out attacks.

Public exploit

Not established by this record

Missing evidence does not mean no public exploit exists.

Remediation

Fix status not established

No structured fix or guidance is available here. Check the latest publisher advisory.

What this means

boneIO black_debian_images versions before 1.6.0 use default Mosquitto MQTT broker credentials, allowing a remote attacker to gain full access. The credentials are publicly documented. Devices upgraded from earlier versions keep their existing credentials.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Attack conditions

No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.

Review supporting sources →

Affected versions

Check the exact model, release, and any platform requirements against your installation.

boneIO · CERT-PL

black_debian_images

1 range
CERT-PL version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

1.2.0 → before 1.6.0

semver versions

unaffected

unknown

Other versions: unaffected

Automatic dependency matching is unavailable for this record. Use the product evidence and publisher’s instructions to check your installation.

What to do

Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.

No structured fix or remediation guidance is available here. Check the full source description and vendor’s latest advisory for a patch or workaround; do not assume another version is safe.

cve.new guidance unless attributed to a publisher. This page does not inspect your installation.

Public exploit evidence

No public exploit reference is identified in the imported evidence. This is not a claim that no exploit exists.

Original source description

Read the full publisher 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.

References

2 sources
cert.pl/en/posts/2026/10/CVE-2026-77052
Security advisoryCERT-PL
boneio.eu/en/docs/black
Source referenceCERT-PL

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-77056

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-1392 ↗

CWE-1392 Use of Default Credentials

CERT-PL

Related →

Environment requirements

These conditions apply together as specified by the publisher. A matching product name alone does not establish exposure.

CERT-PL · platform conditions

Any condition may hold

Any condition may hold

Vulnerable product

cpe:2.3:a:boneio:black_debian_images:*:*:*:*:*:*:*:*

From (inclusive): 1.2.0

Before: 1.6.0

Applicability preview
[
  {
    "operator": "OR",
    "nodes": [
      {
        "operator": "OR",
        "negate": false,
        "cpeMatch": [
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:a:boneio:black_debian_images:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "1.2.0",
            "versionEndExcluding": "1.6.0"
          }
        ]
      }
    ]
  }
]
Contributing organizations · 2
CERT-PL

Assigning organization

2026-10-26
CISA-ADP

Additional data publisher

2026-10-26

Timeline

All times UTC

  1. Advisory published

    Publication date supplied by the source.

  2. Source updated

    Latest modification date supplied by the source.

  3. Last imported by cve.new

    Latest catalog import, not the date we first saw this advisory.

What changed

Follow changes
No substantive changes have been recorded here yet. History starts when cve.new observes a change after tracking is enabled; earlier edits are not reconstructed.

Large field values are marked as truncated previews. Original source snapshots remain retained.