Authorization bypass in RICOH Streamline NX
Priority LOW 36CWE-639Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-639.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00332 26th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Ricoh Company, Ltd. | RICOH Streamline NX | 3.5.1 to 24R3 | — | No fix listed | CNA |
- RICOH Streamline NX VendorRicoh Company, Ltd. Affected 3.5.1 to 24R3 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-21409
- 2026-10-03 Alias added: GHSA-842v-gv8w-xp7c
References
More Ricoh Company, Ltd. vulnerabilities
- TI-2024-34873 Unauthenticated Denial of Service (DoS) via malformed WS-Scan request affecting multiple… CVSS 3.1HIGH 7.5
- TI-2024-34872 Unauthenticated Denial of Service (DoS) via malformed PJL request affecting multiple… CVSS 3.1HIGH 7.5
- TI-2024-34869 Stack-based buffer overflow in Brother Industries, Ltd HL-L8260CDN CVSS 3.1HIGH 7.2
- TI-2026-65073 Ricoh SP 330DN/SP 221/SP C252SF/Aficio SP 3500SF HTTP Multipart Form-Data denial of service CVSS 4.0HIGH 7.1
- TI-2024-34874 Insufficiently protected credentials in Brother Industries, Ltd HL-L8260CDN CVSS 3.1MEDIUM 6.8
- TI-2024-34871 Server-side request forgery in Brother Industries, Ltd HL-L8260CDN CVSS 3.1MEDIUM 5.3
Sources
- CVE-2026-21409 · CVE Program
- CVE-2026-21409 · NVD
- FIRST EPSS
- GHSA-842v-gv8w-xp7c · GitHub Advisory Database · CC BY 4.0
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