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CVE-2026-21409

Quick assessment

Affected
Ricoh Company, Ltd. RICOH Streamline NX
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

RICOH Streamline NX是日本RICOH公司的一款文档和打印管理软件。 RICOH Streamline NX 3.5.1版本至24R3版本存在安全漏洞，该漏洞源于授权不当，可能导致检索用户注册信息和或OIDC令牌。

AI Predicted 5.9 Difficulty: Moderate EPSS 0.34% · P25
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I. Basic Information for CVE-2026-21409

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
RICOH Streamline NX 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
RICOH Streamline NX是日本RICOH公司的一款文档和打印管理软件。 RICOH Streamline NX 3.5.1版本至24R3版本存在安全漏洞，该漏洞源于授权不当，可能导致检索用户注册信息和或OIDC令牌。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Ricoh Company, Ltd. RICOH Streamline NX 3.5.1 to 24R3 -

II. Public POCs for CVE-2026-21409

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III. Intelligence Information for CVE-2026-21409

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IV. Related Vulnerabilities

Same product: RICOH Streamline NX
Same vendor: Ricoh Company, Ltd.
Same weakness: CWE-639

V. Comments for CVE-2026-21409

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