Vulnerability Mitigation/Remediation for Production Printers, Office/Small Office Multifunction Printers and Laser Printers

Description
A passback vulnerability was found in production printers, office/small office multifunction printers and laser printers. This vulnerability could allow an attacker, if they obtain administrative privileges on the product, to acquire authentication information such as SMTP/LDAP connections configured in the product.

Affected Products
・ imageRUNNER ADVANCE Series
・ imageRUNNER Series
・ imagePRESS V Series
・ imagePRESS Series
・ imageCLASS Series
・ i-sensys Series
・ Satera Series

Please refer here for detailed model names.

CVE/CVSS
CVE-2025-3078:
A passback vulnerability of production printers and office multifunction printers
CVSS v4
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
Base Score: 6.3
CVSS v3
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
Base Score: 8.7

CVE-2025-3079:
A passback vulnerability of office/small office multifunction printers and laser printers
CVSS v4
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
Base Score: 6.3
CVSS v3
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
Base Score: 8.7

Mitigation/Remediation
We advise our customers to follow the below hardening guides:
- It is not recommended that a product is connected directly to the internet. When connecting to the internet, use a private IP address in an environment where the internet can be accessed from a secure private network built with firewall products, wired routers or Wi-Fi routers.
- Change the product’s default password to a new password.
- Set up administrator and general users IDs and passwords.
- Ensure that passwords and other similar settings for various functions are sufficiently difficult to guess.
- If the product has authentication functions, use them to confirm the end-user identity who uses the product.
- If the product has multi-factor authentication functions, use them to confirm the end-user identity who uses the product.
- Be aware of physical security needs, including those related to the location of the product etc.

Please refer here for more information on securing products when connecting to a network.

In addition to the above measures, certain products have enhanced security features. The information on the relevant products is uploaded on the website of your local Canon sales representatives.