CVE intelligence and bounded remediation

CVE-2023-0858 — Canon Mf642Cdw Firmware security vulnerability

Medium CVSS 5.3

Improper Authentication of RemoteUI of Office / Small Office Multifunction Printers and Laser Printers(*) which 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.

Severity
Medium
CVSS
5.3 (3.1)
Published
2023-05-11
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-284, CWE-287

Affected products

  • canon / mf642cdw_firmware
  • canon / mf644cdw_firmware
  • canon / mf741cdw_firmware
  • canon / mf743cdw_firmware
  • canon / mf745cdw_firmware
  • canon / lbp621c_firmware

Showing 6 representative product identities from 45 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Authentication bypass and missing authentication

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Map every affected endpoint and protocol path, including alternate ports, legacy routes, recovery flows, service accounts, and machine-to-machine access.
  • Confirm which deployments enable the affected authentication mode and whether the interface is reachable from untrusted networks.
  • Review session, token, credential, and proxy trust configuration without attempting account takeover.

Remediate safely

  • Apply the supported fix and centralize fail-closed authentication before protected request handling.
  • Remove default or embedded credentials, rotate affected secrets and sessions, and bind authentication decisions to the intended audience and channel.
  • Add negative tests for alternate routes, malformed or absent credentials, recovery flows, and proxy-derived identity.

Authoritative sources

Complete CVE record and remediation plan

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