# CVE-2026-63226: Ricoh Printers and MFPs improper restriction on SSH port forwarding

Source: https://junglewise.ai/threats/cve-2026-63226-ricoh-printers-and-mfps-improper-restriction-on-ssh-port  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-23. Updated: 2026-07-23  
License: CC BY 4.0 with a link back

CVE-2026-63226 · Severity: medium · CVSS 5.8 · Published 2026-07-23

Ricoh printers and multifunction devices fail to restrict SSH port forwarding, a feature that can be misused to redirect network traffic. An attacker could use an affected printer as a stepping stone to bypass network security controls and access other sensitive devices or systems on the internal corporate network. This could lead to unauthorized access to internal resources and potential data exposure.

Vendors: [Ricoh](https://junglewise.ai/threats/vendors/ricoh).

## Quick answers

**Is CVE-2026-63226 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-63226 being exploited in the wild.

**How severe is CVE-2026-63226?** Medium severity, with a CVSS score of 5.8, published 23 July 2026.

**Which products and versions are affected?** Ricoh Multifunction Printers All versions where SSH is enabled and firmware is not updated to the latest fixed version; Ricoh Printers All versions where SSH is enabled and firmware is not updated to the latest fixed version.

**Is there a fix for CVE-2026-63226?** A patch was published on 2026-07-23: Firmware updates made available by the developer Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-63226 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-63226?** Check whether you run Ricoh Multifunction Printers or Ricoh Printers at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

Ricoh printers and Multifunction Printers (MFPs) are vulnerable to an improper restriction of communication channel (CWE-923) within their SSH implementation. When the SSH service is enabled, the devices fail to restrict SSH port forwarding, which allows the printer to be used as a proxy. A remote attacker can leverage this to tunnel traffic through the printer to reach other nodes on the local area network (LAN) that might otherwise be inaccessible. The vulnerability is exploitable over the network without authentication if SSH is active. Ricoh has released firmware updates to address this issue by implementing proper restrictions on port forwarding.

## Affected products

- Ricoh Company, Ltd. Printers and Multifunction Printers (MFPs) All versions where SSH is enabled and firmware is not updated to the latest fixed version

## Timeline

- 2026-07-23: advisory: Initial disclosure by JPCERT/CC and Ricoh
- 2026-07-23: patched: Firmware updates made available by the developer

## References

- [https://jp.ricoh.com/security/products/vulnerabilities/vul?id=ricoh-2026-000006](https://jp.ricoh.com/security/products/vulnerabilities/vul?id=ricoh-2026-000006)
- [https://jvn.jp/en/jp/JVN32082029/](https://jvn.jp/en/jp/JVN32082029/)
- [https://www.ricoh.com/products/security/vulnerabilities/vul?id=ricoh-2026-000006](https://www.ricoh.com/products/security/vulnerabilities/vul?id=ricoh-2026-000006)