CVE-2026-63226Network attack vector

LAN access via unrestricted SSH port forwarding

Published Jul 23, 2026 · Updated Jul 23, 2026

Improper endpoint restriction in Ricoh printers and MFPs allows remote attackers to relay traffic to arbitrary LAN hosts through SSH. The devices' SSH service accepts port-forwarding requests without restricting the forwarding destination, turning the device into a network relay. Exploitation requires SSH to be enabled and exposes connectivity to other LAN nodes without reported device data modification or service interruption.

CVSS severity6.9
Medium
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper endpoint restriction in Ricoh printers and MFPs allows remote attackers to relay traffic to arbitrary LAN hosts through SSH. The devices' SSH service accepts port-forwarding requests without restricting the forwarding destination, turning the device into a network relay. Exploitation requires SSH to be enabled and exposes connectivity to other LAN nodes without reported device data modification or service interruption.

The record

CVE
CVE-2026-63226
Published
Jul 23, 2026
Updated
Jul 23, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-923, T1090
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.9JPCERT/CCCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N
5.8JPCERT/CCCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-923Improper Restriction of Communication Channel to Intended Endpoints
T1090Proxy

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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