CVE-2026-20195

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-20195
A 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. This 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.

5.3 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-unauth-bypass-uxjRXGpb Vendor Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:cisco:identity_services_engine:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR cpe:2.3:a:cisco:identity_services_engine:3.3.0:-:*:*:*:*:*:*
cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch1:*:*:*:*:*:*
cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch10:*:*:*:*:*:*
cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch2:*:*:*:*:*:*
cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch3:*:*:*:*:*:*
cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch4:*:*:*:*:*:*
cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch5:*:*:*:*:*:*
cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch6:*:*:*:*:*:*
cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch7:*:*:*:*:*:*
cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch8:*:*:*:*:*:*
cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch9:*:*:*:*:*:*

Configuration 3 (hide)

OR cpe:2.3:a:cisco:identity_services_engine:3.4.0:-:*:*:*:*:*:*
cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch1:*:*:*:*:*:*
cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch2:*:*:*:*:*:*
cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch3:*:*:*:*:*:*
cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch4:*:*:*:*:*:*
cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch5:*:*:*:*:*:*

Configuration 4 (hide)

OR cpe:2.3:a:cisco:identity_services_engine:3.5.0:-:*:*:*:*:*:*
cpe:2.3:a:cisco:identity_services_engine:3.5.0:patch1:*:*:*:*:*:*
cpe:2.3:a:cisco:identity_services_engine:3.5.0:patch2:*:*:*:*:*:*
History

26 Oct 2026, 19:10

Type Values Removed Values Added
Summary
  • (es) Una vulnerabilidad en un endpoint de API de gestión de identidades de Cisco ISE podría permitir a un atacante remoto no autenticado enumerar cuentas de usuario válidas en un dispositivo afectado. Esta vulnerabilidad existe porque se observan mensajes de error cuando se invoca el endpoint de API afectado. Un atacante podría explotar esta vulnerabilidad enviando una serie de solicitudes manipuladas al endpoint afectado y analizando las respuestas diferenciadas. Un exploit exitoso podría permitir al atacante compilar una lista de nombres de usuario válidos en un sistema afectado.
Information

Published : 2026-05-06 17:16

Updated : 2026-10-26 19:10

NVD link : CVE-2026-20195

Mitre link : CVE-2026-20195

CVE.ORG link : CVE-2026-20195

JSON object : View

Products Affected

cisco

  • identity_services_engine
CWE
CWE-204

Observable Response Discrepancy