Improper Authorization in RICOH Streamline NX Affects User Data Security
CVE-2026-21409

8.2HIGH

Key Information:

Vendor

Ricoh Company, Ltd.

Status
Ricoh Streamline Nx
Vendor
CVE Published:
9 January 2026

What is CVE-2026-21409?

An improper authorization vulnerability has been identified in RICOH Streamline NX, allowing attackers to exploit a man-in-the-middle (MitM) attack. If successful, this exploit could enable unauthorized retrieval of sensitive user registration information and OpenID Connect (OIDC) tokens. This vulnerability poses significant risks to user data security and necessitates immediate attention from users of affected versions.

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Affected Version(s)

RICOH Streamline NX 3.5.1 to 24R3

References

https://www.ricoh.com/products/security/vulnerabilities/v...
https://jvn.jp/en/jp/JVN12770174/

CVSS V4

Score:
8.2
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

CVSS V3.0

Score:
5.9
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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