CVE-2026-20195

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vulnerability in an identity management API endpoint of Cisco ISE could allow an unauthenticated, remote attacker to enumerate valid user accounts on an affected device.\r\n\r\nThis vulnerability exists because error messages are observed when the affected API endpoint is called. An attacker could exploit this vulnerability by sending a series of crafted requests to the affected endpoint and analyzing the differentiated responses. A successful exploit could allow the attacker to compile a list of valid usernames on an affected system."}, {"lang": "es", "value": "Una vulnerabilidad en un endpoint de API de gesti\u00f3n de identidades de Cisco ISE podr\u00eda permitir a un atacante remoto no autenticado enumerar cuentas de usuario v\u00e1lidas en un dispositivo afectado.\n\nEsta vulnerabilidad existe porque se observan mensajes de error cuando se invoca el endpoint de API afectado. Un atacante podr\u00eda explotar esta vulnerabilidad enviando una serie de solicitudes manipuladas al endpoint afectado y analizando las respuestas diferenciadas. Un exploit exitoso podr\u00eda permitir al atacante compilar una lista de nombres de usuario v\u00e1lidos en un sistema afectado."}], "id": "CVE-2026-20195", "lastModified": "2026-10-26T19:10:00.163", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "psirt@cisco.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-20195", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-05-06T17:34:47.638851Z", "version": "2.0.3"}}]}, "published": "2026-05-06T17:16:21.630", "references": [{"source": "psirt@cisco.com", "tags": ["Vendor Advisory"], "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-unauth-bypass-uxjRXGpb"}], "sourceIdentifier": "psirt@cisco.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-204"}], "source": "psirt@cisco.com", "type": "Secondary"}]}

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