Advisory Details

May 28th, 2025

(Pwn2Own) Canon imageCLASS MF656Cdw sfpcmAuthenticateSecAdmin Stack-based Buffer Overflow Remote Code Execution Vulnerability

CVE ID	CVE-2025-2146
CVSS SCORE	8.8, AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS	Canon
AFFECTED PRODUCTS	imageCLASS MF656Cdw
VULNERABILITY DETAILS	This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Canon imageCLASS MF656Cdw printers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the sfpcmAuthenticateSecAdmin function. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the device.
ADDITIONAL DETAILS	Canon has issued an update to correct this vulnerability. More details can be found at: https://www.canon-europe.com/support/product-security/#news
DISCLOSURE TIMELINE	2024-12-19 - Vulnerability reported to vendor 2025-05-28 - Coordinated public release of advisory 2025-05-28 - Advisory Updated
CREDIT	YingMuo (@YingMuo) working with DEVCORE Internship Program.

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