CVE-2026-56809: Ricoh Web Image Monitor reflected XSS in printers and MFPs

CVE-2026-56809 · Severity: medium · CVSS 6.1 · Published 2026-06-30

A security vulnerability has been identified in the Web Image Monitor software used to manage various Ricoh laser printers and multifunction printers (MFPs). This flaw could allow an attacker to execute malicious scripts in the web browser of a user who is currently managing the printer. If exploited, this could lead to unauthorized actions being performed on the printer management interface or the theft of session information.

Vendors: Ricoh.

Quick answers

Is CVE-2026-56809 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-56809 being exploited in the wild.
How severe is CVE-2026-56809?
Medium severity, with a CVSS score of 6.1, published 30 June 2026.
Which products and versions are affected?
Ricoh Web Image Monitor All versions implementing Web Image Monitor prior to the June 2026 updates.
Is there a fix for CVE-2026-56809?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-56809 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-56809?
Check whether you run Ricoh Web Image Monitor 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

A reflected cross-site scripting (XSS) vulnerability exists in Ricoh Web Image Monitor, a web-based management interface embedded in various Ricoh laser printers and MFPs. The vulnerability (CWE-79) occurs when the application fails to properly neutralize user-supplied input that is subsequently reflected in the web interface. An unauthenticated remote attacker can exploit this by tricking a user into clicking a specially crafted link while they are logged into or accessing the Web Image Monitor. Successful exploitation allows the execution of arbitrary JavaScript in the context of the victim's browser session, potentially leading to session hijacking or unauthorized configuration changes. Ricoh has released updates to address this issue.

Affected products

  • Ricoh Company, Ltd. Multiple laser printers and MFPs which implement Ricoh Web Image Monitor All versions implementing Web Image Monitor prior to the June 2026 updates

Timeline

  • 2026-06-30: disclosed
  • 2026-06-30: advisory: JPCERT/CC and Ricoh published advisories.

References

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