{"id":"CVE-2026-66760","title":"SAP Approuter does not correctly validate client certificates in certain callback flows","summary":"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…","severity":"medium","cvss":6.4,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:L","cwe":["CWE-295"],"vendor":"sap","product":"approuter","affected":["approuter < 23.0.0"],"patched":["approuter 23.0.0"],"published":"2026-08-11","updated":"2026-09-08","sourceUpdated":"2026-09-08T20:22:13.790","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-66760","references":[{"url":"https://me.sap.com/notes/3786038","label":"cna@sap.com"},{"url":"https://url.sap/sapsecuritypatchday","label":"cna@sap.com"}],"tags":["nvd"],"epss":0.00114,"epssPercentile":0.01658,"ingestedAt":"2026-09-08T21:11:12.274Z","slug":"CVE-2026-66760","body":"## Overview\n\nSAP 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.\n\n## Affected\n\n- `approuter < 23.0.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `approuter 23.0.0`","depth":"sunlit","depthScore":35,"depthScoreParts":{"impact":35.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}