Vulnerability · Published Jan 9, 2026 · Assigned by jpcert

CVE-2026-21409

Medium 5.9

In plain English

A medium-severity authorization bypass via user-controlled key in RICOH Streamline NX from Ricoh Company, Ltd.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities).

Severity (CVSS 3.0)5.9Medium

Exploit odds (30 days)0.3%top 73.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 products (as reported)

Vendor	Product	Versions
Ricoh Company, Ltd.	RICOH Streamline NX	3.5.1 to 24R3

Weakness: CWE-639 · Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

In plain English

Official description

Affected products (as reported)

References