CVE-2023-6229

Code execution via unchecked CADM filename length

Published Feb 6, 2024 · Updated Jun 17, 2025

Out-of-bounds write in Canon printer firmware 03.07 and earlier allows remote attackers to execute code or make devices unresponsive. The CADM service's rmSetFileName operation copies a user-supplied CPCA PDL Resource Download filename into a fixed-length buffer without validating its length. Unauthenticated access from the same network segment is sufficient, and successful exploitation runs code in the device context or interrupts printing by leaving the device unresponsive.

CVSS severity9.8
Critical
EPSS probability1.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in Canon printer firmware 03.07 and earlier allows remote attackers to execute code or make devices unresponsive. The CADM service's rmSetFileName operation copies a user-supplied CPCA PDL Resource Download filename into a fixed-length buffer without validating its length. Unauthenticated access from the same network segment is sufficient, and successful exploitation runs code in the device context or interrupts printing by leaving the device unresponsive.

The record

CVE
CVE-2023-6229
Published
Feb 6, 2024
Updated
Jun 17, 2025
Vendor
Canon Inc.
Product
Color imageCLASS MF750C Series
Classifications
CWE-787, T1210
Attack vector
adjacent
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

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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 vectoradjacent
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
8.8Trend Micro Zero Day InitiativeCVSS:3.1/AV:A/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.

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No observations available

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

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1210Exploitation of Remote Services

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

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Your stack

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