dbcve.org
Bizhub C750i FirmwareOperating system · Konicaminolta

CVE-2021-20869

MEDIUM · 6.5 CVSS v3.1 Published 2022-01-04
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
70/100
Remediation priority · Elevated
No privileges 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
Exposure of sensitive information to an unauthorized actor vulnerability in KONICA MINOLTA bizhub series (bizhub C750i G00-35 and earlier, bizhub C650i/C550i/C450i G00-B6 and earlier, bizhub C360i/C300i/C250i G00-B6 and earlier, bizhub 750i/650i/550i/450i G00-37 and earlier, bizhub 360i/300i G00-33 and earlier, bizhub C287i/C257i/C227i G00-19 and earlier, bizhub 306i/266i/246i/226i G00-B6 and earlier, bizhub C759/C659 GC7-X8 and earlier, bizhub C658/C558/C458 GC7-X8 and earlier, bizhub 958/808/758 GC7-X8 and earlier, bizhub 658e/558e/458e GC7-X8 and earlier, bizhub C287/C227 GC7-X8 and earlier, bizhub 287/227 GC7-X8 and earlier, bizhub 368e/308e GC7-X8 and earlier, bizhub C368/C308/C258 GC9-X4 and earlier, bizhub 558/458/368/308 GC9-X4 and earlier, bizhub C754e/C654e GDQ-M0 and earlier, bizhub 754e/654e GDQ-M0 and earlier, bizhub C554e/C454e GDQ-M1 and earlier, bizhub C364e/C284e/C224e GDQ-M1 and earlier, bizhub 554e/454e/364e/284e/224e GDQ-M1 and earlier, bizhub C754/C654 C554/C454 GR1-M0 and earlier, bizhub C364/C284/C224 GR1-M0 and earlier, bizhub 754/654 GR1-M0 and earlier, bizhub C4050i/C3350i/C4000i/C3300i G00-B6 and earlier, bizhub C3320i G00-B6 and earlier, bizhub 4750i/4050i G00-22 and earlier, bizhub 4700i G00-22 and earlier, bizhub C3851FS/C3851/C3351 GC9-X4 and earlier, and bizhub 4752/4052 GC9-X4 and earlier) allows an attacker on the adjacent network to obtain some of user credentials if LDAP server authentication is enabled via a specific SOAP message.

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 · high confidence

This is an information disclosure vulnerability in KONICA MINOLTA bizhub multifunction printers where an attacker on the adjacent network can obtain user credentials via a specific SOAP message when LDAP server authentication is enabled. The vulnerability exposes credential data during the LDAP authentication process.

MitigationApply the vendor firmware updates (G00-36, G00-B7, G00-38, G00-34, G00-20, G00-B7, GC7-X9, GC9-X5, GDQ-M1, GDQ-M2, GR1-M1, G00-B7, G00-B7, G00-23, G00-23, GC9-X5, GC9-X5 respectively for each model series) to address this vulnerability. Consider network segmentation to limit adjacent network access to these devices.

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 C750i FirmwareOperating system
Affected:< g00-e9
Bizhub C650i FirmwareOperating system
Affected:< g00-e9
Bizhub C550i FirmwareOperating system
Affected:< g00-e9
Bizhub C450i FirmwareOperating system
Affected:< g00-e9
Bizhub C360i FirmwareOperating system
Affected:< g00-e9
Bizhub C300i FirmwareOperating system
Affected:< g00-e9
Bizhub C250i FirmwareOperating system
Affected:< g00-e9
Bizhub 750i FirmwareOperating system
Affected:< g00-e9

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
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

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

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 the bizhub model
    Check the device model via its web interface (usually at the device panel or via /web/gui/ in the browser) or by printing a configuration page from the device control panel. Confirm it matches one of: C750i, C650i, C550i, C450i, C360i, C300i, C250i, or 750i.
    Affected if The device is one of the listed models.
  2. Check the firmware version
    Access the device web interface and navigate to the firmware or system information section. Alternatively, print a device status page from the control panel to view the firmware version.
    Affected if The firmware version is earlier than g00-e9.
  3. Verify if LDAP server authentication is enabled
    Log into the device web interface as administrator. Navigate to the authentication or user management settings. Look for LDAP server configuration or LDAP authentication settings. Check whether LDAP authentication is turned on or configured.
    Affected if LDAP server authentication is enabled or configured on the device.
  4. Assess network accessibility
    Determine if the device is accessible from the adjacent network. Check if the device IP is reachable from network segments other than the trusted management VLAN. Verify if there are firewall rules allowing SOAP-based access (typically ports 80/443 or custom SOAP ports) from adjacent network segments.
    Affected if The device is reachable from an adjacent network segment on ports used for web/SOAP access.

If the device is an affected bizhub model with firmware below g00-e9 AND LDAP server authentication is enabled, the environment is affected by this vulnerability.

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
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply the vendor firmware updates (G00-36, G00-B7, G00-38, G00-34, G00-20, G00-B7, GC7-X9, GC9-X5, GDQ-M1, GDQ-M2, GR1-M1, G00-B7, G00-B7, G00-23, G00-23, GC9-X5, GC9-X5 respectively for each model series) to address this vulnerability. Consider network segmentation to limit adjacent network access to these devices.

Recommended fix High confidence

Firmware g00-e9 or later for the respective bizhub model

  1. 1. Identify the exact model number and current firmware version of the affected Konica Minolta bizhub device
  2. 2. Download the latest firmware update from the official Konica Minolta support website (www.konicaminolta.com or www.konicaminolta.jp)
  3. 3. Follow Konica Minolta's standard firmware update procedure, typically via the device's web interface or USB storage
  4. 4. After updating, verify the firmware version has changed to g00-e9 or later
  5. 5. If LDAP server authentication is enabled, consider reviewing LDAP settings and monitoring access logs for any suspicious activity
Caveat Firmware updates typically require device downtime; ensure to inform users and back up any necessary settings before updating

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

Fix this in Bizhub C750i Firmware Scoped from the published advisory
  • Consultation6.0 h
  • Implementation12.0 h
  • Testing8.0 h
  • Review / QA4.0 h
30.0 hours of engineering $5,280
Get help mitigating

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $8,448.

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2021-20869 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

Get it on GitHub Scan in the browser

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-2021-20869 in production — separate from our analysis above.

No notes yet

Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.

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