CVE-2023-6230Network attack vector

Unauthenticated code execution via Address Book password overflow

Published Feb 6, 2024 · Updated Jun 17, 2025

Buffer overflow in Canon printer firmware 03.07 and earlier allows remote attackers to execute arbitrary code or crash the device. The Mobile Device Function's Address Book authentication process writes an overlong password beyond its intended buffer. Network access to the printer is sufficient; a successful request can corrupt memory, execute code, or leave the appliance unresponsive.

CVSS severity9.8
Critical
EPSS probability1.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Buffer overflow in Canon printer firmware 03.07 and earlier allows remote attackers to execute arbitrary code or crash the device. The Mobile Device Function's Address Book authentication process writes an overlong password beyond its intended buffer. Network access to the printer is sufficient; a successful request can corrupt memory, execute code, or leave the appliance unresponsive.

The record

CVE
CVE-2023-6230
Published
Feb 6, 2024
Updated
Jun 17, 2025
Vendor
Canon Inc.
Product
Color imageCLASS MF750C Series
Classifications
CWE-787, T1499, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 6, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 17, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=03.07 and earlier

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Canon Inc. · Color imageCLASS MF750C Seriesversion=03.07 and earlier
Canon Inc. · i-SENSYS MF750C Seriesversion=03.07 and earlier
Canon Inc. · C1333i Seriesversion=03.07 and earlier
Canon Inc. · Color imageCLASS X LBP1333Cversion=03.07 and earlier
Canon Inc. · Color imageCLASS LBP674Cversion=03.07 and earlier
Canon Inc. · i-SENSYS LBP673Cdwversion=03.07 and earlier
Canon Inc. · Satera MF750C Seriesversion=03.07 and earlier
Canon Inc. · Satera LBP670C Seriesversion=03.07 and earlier
Canon Inc. · Color imageCLASS X MF1333C Seriesversion=03.07 and earlier
Canon Inc. · C1333Pversion=03.07 and earlier

Published CVSS scores

9.8Canon Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1499Endpoint Denial of Service
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo