CVE-2026-21409
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2026-01-09

Last updated on: 2026-01-09

Assigner: JPCERT/CC

Description
Improper authorization vulnerability exists in RICOH Streamline NX 3.5.1 to 24R3. If a man-in-the-middle attack is conducted on the communication between the affected product and its user, and some crafted request is processed by the product, the user's registration information and/or OIDC (OpenID Connect) tokens may be retrieved.
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Meta Information
Published
2026-01-09
Last Modified
2026-01-09
Generated
2026-06-16
AI Q&A
2026-01-10
EPSS Evaluated
2026-06-15
NVD
CVE-2026-21409
EUVD
EUVD-2026-1780
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
ricoh streamline_nx From 3.5.1 (inc) to 24R3 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-639 The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.
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Executive Summary

This vulnerability is an improper authorization issue in RICOH Streamline NX versions 3.5.1 to 24R3. It occurs when a man-in-the-middle (MITM) attack is performed on the communication between the product and its user. If the attacker sends a crafted request that the product processes, they may be able to retrieve the user's registration information and/or OpenID Connect (OIDC) tokens. [1]

Impact Analysis

The vulnerability can lead to unauthorized disclosure of sensitive information such as user registration details and OIDC tokens. This can compromise user accounts and potentially allow attackers to impersonate users or gain unauthorized access to systems relying on these tokens, impacting confidentiality and security. [1]

Mitigation Strategies

To mitigate this vulnerability, users should update RICOH Streamline NX to the latest version provided by Ricoh. Until an update is applied, it is recommended to apply the workaround detailed in Ricoh's advisories and official communications. [1]

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