CVE-2023-0857
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 · uneditedUnintentional change of settings during initial registration of system administrators which uses control protocols. The affected Office / Small Office Multifunction Printers and Laser Printers(*) may allow an attacker on the network segment to trigger unauthorized access to the product. *:Satera LBP660C Series/LBP620C Series/MF740C Series/MF640C Series firmware Ver.11.04 and earlier sold in Japan. Color imageCLASS LBP660C Series/LBP 620C Series/X LBP1127C/MF740C Series/MF640C Series/X MF1127C firmware Ver.11.04 and earlier sold in US. i-SENSYS LBP660C Series/LBP620C Series/MF740C Series/MF640C Series, C1127P, C1127iF, C1127i firmware Ver.11.04 and earlier sold in Europe.
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 confidenceDuring initial system administrator registration on affected Canon Satera, Color imageCLASS, and i-SENSYS multifunction/laser printers (firmware Ver.11.04 and earlier), a vulnerability in the control protocol allows an attacker on the same network segment to manipulate settings unintentionally, leading to unauthorized access to the device.
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<= 11.04<= 11.04<= 11.04<= 11.04<= 11.04<= 11.04<= 11.04<= 11.04CVSS 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
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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 checksWork through these to decide whether this CVE applies to you.
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Identify printer modelAccess the printer's web interface, check the control panel, or use SNMP to retrieve the model name. Common paths: http://<printer-ip>/ or check the device's printed test page.Affected if Model is one of: MF642cdw, MF644cdw, MF741cdw, MF743cdw, MF745cdw, LBP621c, LBP622c, LBP661c, or other Canon Satera/Color imageCLASS/i-SENSYS multifunction/laser printers from the same generation.
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Check firmware versionAccess the printer's web interface and navigate to the Device Information or Settings > Firmware Update page. Alternatively, print a configuration page from the control panel to view the firmware version.Affected if Firmware version is 11.04 or earlier.
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Determine if initial administrator registration is pending or was recently completedCheck if the printer has completed the initial administrator account setup. Access the web interface or control panel - if prompted to set an administrator password for the first time, or if the device was recently reset to factory defaults, the vulnerability window is active.Affected if Initial administrator registration has not been completed, is currently in progress, or the device was recently factory reset.
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Assess network accessibilityPing the printer IP address and attempt to access the web interface from a system on the same network segment. Use network scanning tools to confirm the device is reachable.Affected if Printer is accessible from network segments where untrusted users or attackers could reside.
A user is affected if they have one of the listed Canon printer models running firmware version 11.04 or earlier, especially if the device is in or was recently in the initial administrator registration phase and is accessible on a network with untrusted users.
Generated from the published advisory. Verify against your own configuration.
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 · scopedNetwork segment isolation and restricting access during initial administrator registration are recommended until an official firmware patch is available from Canon.
Firmware version > 11.04 (check Canon support for model-specific latest firmware)
- 1. Identify the exact Canon printer model from the affected product list (MF642cdw, MF644cdw, MF741cdw, MF743cdw, MF745cdw, LBP621c, LBP622c, LBP661c)
- 2. Access the Canon support website for your region (canon.jp, www.usa.canon.com, or www.canon-europe.com depending on purchase location)
- 3. Navigate to the product support page for your specific printer model
- 4. Locate the firmware download section and check for versions newer than 11.04
- 5. Download the latest firmware version available for your model
- 6. Follow Canon's firmware update instructions (typically via USB connection or Canon MF/LBP Toolbox utility)
- 7. After updating, verify the firmware version has changed from <= 11.04 to the new version
- 8. During initial system administrator registration, ensure the procedure is performed on a trusted network segment
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2023-0857 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2023-0857 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- 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