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Bizhub 226i FirmwareOperating system · Konicaminolta

CVE-2022-29586

HIGH · 7.4 CVSS v3.1 Published 2022-05-16
Fix available
A fix is available. Upgrade to 2022-04-14 or later.
See remediation →
76/100
Remediation priority · High
Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Konica Minolta bizhub MFP devices before 2022-04-14 allow a Sandbox Escape. An attacker must attach a keyboard to a USB port, press F12, and then escape from the kiosk mode.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

This is a local physical sandbox escape vulnerability in Konica Minolta bizhub MFP devices. An attacker with physical access can attach a keyboard to a USB port, press F12 to invoke developer tools, and escape the restricted kiosk mode environment. The vulnerability exists in firmware versions released before 2022-04-14.

MitigationUpdate affected bizhub MFP devices to firmware dated 2022-04-14 or later. Additionally, restrict physical access to USB ports and implement device monitoring to detect unauthorized peripheral attachments.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Bizhub 226i FirmwareOperating system
Affected:< 2022-04-14
Bizhub 227 FirmwareOperating system
Affected:< 2022-04-14
Bizhub 246i FirmwareOperating system
Affected:< 2022-04-14
Bizhub 287 FirmwareOperating system
Affected:< 2022-04-14
Bizhub 306i FirmwareOperating system
Affected:< 2022-04-14
Bizhub 308 FirmwareOperating system
Affected:< 2022-04-14
Bizhub 308e FirmwareOperating system
Affected:< 2022-04-14
Bizhub 367 FirmwareOperating system
Affected:< 2022-04-14

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Physical
Complexity
Low
Privileges
Low
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify device model and firmware version
    Access the device web interface or control panel, navigate to System Settings or Device Information, and record the exact firmware version and date. On most bizhub devices, this is found under Utility > Device Information or through the embedded web server at the device IP address.
    Affected if The model is one of: Bizhub 226i, 227, 246i, 287, 306i, 308, 308e, or 367, AND the firmware version date is before 2022-04-14
  2. Confirm kiosk mode is enabled
    Check the device security or system settings to determine if restricted kiosk mode or Application Sandbox is currently active. This is typically found under Security settings or Device Lock settings in the web interface or control panel.
    Affected if Kiosk mode or restricted application sandbox is enabled, as the escape only applies when the device is operating in this restricted state
  3. Verify physical USB port accessibility
    Visually inspect the device exterior to confirm USB Type-A ports are exposed and accessible. Check all USB ports on the front and rear panels of the MFP device.
    Affected if USB ports are physically accessible without tampering, as the attack requires attaching an external keyboard to a USB port

The environment is affected if the device is a listed bizhub model running firmware dated before 2022-04-14 AND kiosk mode is enabled AND USB ports are physically accessible.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 2022-04-14 or later
Fixed in 2022-04-14
Interim mitigation

Update affected bizhub MFP devices to firmware dated 2022-04-14 or later. Additionally, restrict physical access to USB ports and implement device monitoring to detect unauthorized peripheral attachments.

Recommended fix High confidence

Firmware version released on 2022‑04‑14 or later (e.g., latest bizhub firmware for your model)

  1. Identify the specific bizhub model (e.g., Bizhub 226i, 227, 246i, 287, 306i, 308, 308e, or 367) from the affected list.
  2. Visit the official Konica Minolta support site and locate the firmware download section for that model.
  3. Download the firmware version dated 2022‑04‑14 or later (the latest available firmware for your model).
  4. Back up the device’s current configuration settings via the web UI or control panel to avoid loss after the update.
  5. Access the device’s web interface (PageScope) using its IP address, then navigate to Device Settings > Firmware Update.
  6. Upload the downloaded firmware file and initiate the update; follow any on‑screen instructions.
  7. Allow the device to reboot and complete the update process; do not power off during this time.
  8. After the device restarts, verify that the installed firmware version is 2022‑04‑14 or later and confirm the kiosk mode cannot be bypassed using the F12 method.
Caveat The firmware update may reset network or device settings; restore from the backup after upgrading.

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Bizhub 226i Firmware Scoped from the published advisory
  • Consultation4.0 h
  • Implementation6.0 h
  • Testing3.0 h
  • Review / QA2.0 h
15.0 hours of engineering $2,690
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2022-29586 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data