Published:2026/06/30  Last Updated:2026/06/30

JVN#48718197
Reflected cross-site scripting vulnerability in multiple laser printers and MFPs which implement Ricoh Web Image Monitor

Overview

Multiple laser printers and MFPs (multifunction printers) which implement Ricoh Web Image Monitor contain a reflected cross-site scripting vulnerability.

Products Affected

  • Specific products and versions which implement Web Image Monitor
As for the details of affected product names and versions, refer to the information provided by the developer.

Description

Web Image Monitor provided by Ricoh Company, Ltd. is a web server that is included in and runs on laser printers and MFPs (multifunction printers).
Web Image Monitor contains the vulnerability listed below.

  • Reflected cross-site scripting (CWE-79)
    • CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N Base Score 5.1
    • CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Base Score 6.1
    • CVE-2026-56809

Impact

An arbitrary script may be executed on the web browser of the user who accesses Web Image Monitor.

Solution

Update Web Image Monitor
Update Web Image Monitor to the latest version according to the information provided by the developer.

Vendor Status

Vendor Link
Ricoh Company, Ltd. Specific Ricoh MFP and Printer Products: Reflected Cross-Site Scripting (XSS) Vulnerability in Web Image Monitor

References

JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Credit

Tomasz Holeksa of Pentest Limited reported this vulnerability to Ricoh Company, Ltd. directly and coordinated. After the coordination, Ricoh Company, Ltd. reported this case to IPA under Information Security Early Warning Partnership, and JPCERT/CC coordinated with Ricoh Company, Ltd. for JVN publication.

Other Information

JPCERT Alert
JPCERT Reports
CERT Advisory
CPNI Advisory
TRnotes
CVE CVE-2026-56809
JVN iPedia JVNDB-2026-000092