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-2025-14232
- CVE-2025-14233
- CVE-2025-14234
- CVE-2025-14235
- CVE-2025-14236
- CVE-2025-14237
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
- 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. - 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].
<Black and White 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.