PT-2026-37658 · Cisco · Cisco Identity Services Engine

Published 2026-05-06 · Updated 2026-05-06 · CVE-2026-20195

Mitre

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

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.

Fix

Weakness Enumeration

CWE-204

Related Identifiers

CVE-2026-20195

Affected Products

Cisco Identity Services Engine

References · 2

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-unauth-bypass-uxjRXGpb · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-20195 · Security Note