CVE-2026-20195

Summary

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.

Affected Software

VendorProductVersion RangeStatus
CiscoCisco Identity Services Engine Software3.3.0affected
CiscoCisco Identity Services Engine Software3.3 Patch 2affected
CiscoCisco Identity Services Engine Software3.3 Patch 1affected
CiscoCisco Identity Services Engine Software3.3 Patch 3affected
CiscoCisco Identity Services Engine Software3.4.0affected
CiscoCisco Identity Services Engine Software3.3 Patch 4affected
CiscoCisco Identity Services Engine Software3.4 Patch 1affected
CiscoCisco Identity Services Engine Software3.3 Patch 5affected
CiscoCisco Identity Services Engine Software3.3 Patch 6affected
CiscoCisco Identity Services Engine Software3.4 Patch 2affected
CiscoCisco Identity Services Engine Software3.3 Patch 7affected
CiscoCisco Identity Services Engine Software3.4 Patch 3affected
CiscoCisco Identity Services Engine Software3.5.0affected
CiscoCisco Identity Services Engine Software3.4 Patch 4affected
CiscoCisco Identity Services Engine Software3.3 Patch 8affected
CiscoCisco Identity Services Engine Software3.5 Patch 1affected
CiscoCisco Identity Services Engine Software3.3 Patch 9affected
CiscoCisco Identity Services Engine Software3.4 Patch 5affected
CiscoCisco Identity Services Engine Software3.5 Patch 3affected
CiscoCisco Identity Services Engine Software3.5 Patch 2affected
CiscoCisco Identity Services Engine Software3.3 Patch 10affected

Weaknesses

  • CWE-204: Observable Response Discrepancy

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

References