CVE-2025-14234
Published: 16 January 2026
Summary
CVE-2025-14234 is a critical-severity Out-of-bounds Write (CWE-787) vulnerability in Canon Mf455Dw Firmware. Its CVSS base score is 9.8 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 20.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-16 (Memory Protection).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Directly remediates the buffer overflow vulnerability through application of Canon firmware updates as detailed in vendor advisories.
Provides memory protections like non-executable stacks and address randomization to block arbitrary code execution from buffer overflow exploits.
Enforces validation of CPCA list inputs to prevent buffer overflows triggered by malformed network packets.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Buffer overflow in network-exposed printer service enables remote unauthenticated RCE or DoS, directly mapping to exploitation of public-facing/remote applications.
NVD Description
Buffer overflow in CPCA list processing on Small Office Multifunction Printers and Laser Printers(*) which may allow an attacker on the network segment to trigger the affected product being unresponsive or to execute arbitrary code. *: Satera LBP670C Series/Satera MF750C…
more
Series firmware v06.02 and earlier sold in Japan.Color imageCLASS LBP630C/Color imageCLASS MF650C Series/imageCLASS LBP230 Series/imageCLASS X LBP1238 II/imageCLASS MF450 Series/imageCLASS X MF1238 II/imageCLASS X MF1643i II/imageCLASS X MF1643iF II firmware v06.02 and earlier sold in US.i-SENSYS LBP630C Series/i-SENSYS MF650C Series/i-SENSYS LBP230 Series/1238P II/1238Pr II/i-SENSYS MF450 Series/i-SENSYS MF550 Series/1238i II/1238iF II/imageRUNNER 1643i II/imageRUNNER 1643iF II firmware v06.02 and earlier sold in Europe.
Deeper analysisAI
CVE-2025-14234 is a buffer overflow vulnerability (CWE-787) in the CPCA list processing component of various Canon Small Office Multifunction Printers and Laser Printers running firmware version v06.02 and earlier. Affected products include the Satera LBP670C Series and Satera MF750C Series sold in Japan; Color imageCLASS LBP630C, Color imageCLASS MF650C Series, imageCLASS LBP230 Series, imageCLASS X LBP1238 II, imageCLASS MF450 Series, imageCLASS X MF1238 II, imageCLASS X MF1643i II, and imageCLASS X MF1643iF II sold in the US; and i-SENSYS LBP630C Series, i-SENSYS MF650C Series, i-SENSYS LBP230 Series, 1238P II, 1238Pr II, i-SENSYS MF450 Series, i-SENSYS MF550 Series, 1238i II, 1238iF II, imageRUNNER 1643i II, and imageRUNNER 1643iF II sold in Europe.
An unauthenticated attacker on the same network segment can exploit this vulnerability remotely with low complexity and no user interaction required. Successful exploitation may cause the affected printer to become unresponsive (denial of service) or allow execution of arbitrary code, as indicated by the CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
Canon advisories provide remediation measures for this vulnerability, detailed in support notices such as https://canon.jp/support/support-info/260115vulnerability-response, https://psirt.canon/advisory-information/cp2026-001/, https://www.canon-europe.com/support/product-security/, and https://www.usa.canon.com/support/canon-product-advisories/Service-Notice-Regarding-Remediation-Measure-Against-Potential-Buffer-Overflow-Vulnerability-in-Laser-Printers-and-Small-Office-Multifunctional-Printers.
Details
- CWE(s)