Service Notice: Regarding Remediation Measure Against Potential Buffer Overflow Vulnerability in Laser Printers and Small Office Multifunctional Printers

January 15, 2026

Updated:  February 20, 2026

Canon U.S.A., Inc. has recently become aware of potential multiple buffer overflow vulnerabilities in the Canon Laser Printers and Small Office Multifunctional Printers listed under “Affected Models” below.

If the product is connected directly to the Internet without using a wired or Wi-Fi router, a third party could potentially execute arbitrary code, or the product could be subjected to a Denial-of-Service (DoS) attack.

Listed below are the CVE numbers associated with the potential Buffer Overflow issue:

CVE-2025-14231     CVE-2025-14235
CVE-2025-14232     CVE-2025-14236
CVE-2025-14233     CVE-2025-14237
CVE-2025-14234      


Affected Models:

imageCLASS MF Series
MF269DW VP II**/MF269DW II**/MF267DW II**/MF264DW II**/MF262DW II**
MF275DW**/MF273DW**/MF272DW**
MF289DW**/MF287DW**/MF284DW**
MF455DW/MF453DW/MF452DW/MF451DW
MF465DW**/MF462DW**
MF465DW II*/MF462DW II*
MF656CDW/MF654CDW/MF653CDW/MF652CW
MF665CDW*/MF663CDW*/MF662CDW*
MF753CDW**/MF751CDW**
MF753CDW II*/MF751CDW II*
MF1238 II
MF1333C**
MF1440**
MF1643iF II/MF1643i II

imageCLASS LBP Series
LBP122DW**
LBP172DW**
LBP237DW/LBP236DW
LBP247DW**/LBP246DW**
LBP247DW II*/LBP246DW II*
LBP633CDW/LBP632CDW
LBP647CDW*/LBP646DW*
LBP674CDW**
LBP674CDW II*
LBP1238 II
LBP1333C**
LBP1440**

imageFORCE Series
C1333F*/C1333P*
1440F*/1440P*

*Added 2/10/26
**Added 2/20/26

Note: If we determine that additional products could potentially be impacted by this matter, we will issue an updated Service Notice.

Mitigation/Remediation:

  1. We recommend that our customers set a private IP address for the products and create a network environment with a firewall or wired/Wi-Fi router that can restrict network access. Please refer here for more details on securing products when connecting to a network.
  2. In addition, we advise that our customers install the latest firmware available using the instructions below.

To update the firmware via the Internet, take the following steps from the printer unit:

<Touch Panel Model>
Select [Update Firmware] on the Home screen.
When a license screen appears, select [Accept].
Select [OK].

<5-line LCD Model>
Select [Menu] on the Home screen.
Select [Management Settings].
Select [Remote UI Settings/Update Firmware] > [Update Firmware].
Select [Via Internet].
Check the message and select [Yes].
When a license screen appears, press [OK].
Select [OK].

For more information, please refer to the "Updating the Firmware" section in the product’s User Manual.

Thank you,
Customer Support
Canon U.S.A., Inc.

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