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CVE-2026-21409

HIGH
8.2
CVSS Score
Published: January 9, 2026 at 07:15 AM UTC
Updated: June 17, 2026 at 10:18 AM UTC
1 product affected across 1 vendorStreamline NX

Using RICOH Streamline NX by Ricoh Company, Ltd.?

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Severity
HIGH8.2
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Streamline NX· Ricoh
60%
3.5.1 ≤ v ≤ 24R3

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

Source: cverecord
https://www.ricoh.com/products/security/vulnerabilities/vul?id=ricoh-2025-000011
Source: cverecord
https://jvn.jp/en/jp/JVN12770174/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.2HIGHjpcert
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-639

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