CVE-2026-66760: SAP Approuter

Medium severity, CVSS 6.4. EPSS: 0.2% chance of exploitation in the next 30 days.

SAP Approuter does not correctly validate client certificates in certain callback flows. An attacker with low privileges, holding a certificate from the same trusted authority with matching subject values, could bypass the identity check. This complexity makes the attack difficult to execute. Successful exploitation could allow impersonation of a trusted internal component, resulting in a high impact on integrity and a low impact on confidentiality and availability.

Affected products

• SAP Approuter: before 23.0.0 (fixed in 23.0.0)

Published 2026-08-11. Last modified 2026-09-08.