CVE-2026-21409: Ricoh Company, Ltd Ricoh Streamline NX

High severity, CVSS 8.2. EPSS: 0.3% chance of exploitation in the next 30 days.

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 products

• Ricoh Company, Ltd Ricoh Streamline NX

Published 2026-01-09. Last modified 2026-06-17.