CVE-2026-20193 PUBLISHED

Cisco Identity Services Engine Authentication Bypass Vulnerability

Assigner: cisco
Reserved: 08.10.2025 Published: 06.05.2026 Updated: 06.05.2026

A vulnerability in the RADIUS Policy API endpoints of Cisco ISE could allow an authenticated, remote attacker with read-only Administrator privileges to gain unauthorized access to sensitive information on an affected device.

This vulnerability is due to improper role-based access control (RBAC) permissions on the RADIUS Policy API endpoints. An attacker could exploit this vulnerability by bypassing the web-based management interface and directly calling an affected endpoint. A successful exploit could allow the attacker to gain unauthorized read access to sensitive RADIUS Policy details that are restricted for their role.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CVSS Score: 4.3

Product Status

Vendor Cisco
Product Cisco Identity Services Engine Software
Versions Default: unknown
  • Version 3.3.0 is affected
  • Version 3.3 Patch 2 is affected
  • Version 3.3 Patch 1 is affected
  • Version 3.3 Patch 3 is affected
  • Version 3.4.0 is affected
  • Version 3.3 Patch 4 is affected
  • Version 3.4 Patch 1 is affected
  • Version 3.3 Patch 5 is affected
  • Version 3.3 Patch 6 is affected
  • Version 3.4 Patch 2 is affected
  • Version 3.3 Patch 7 is affected
  • Version 3.4 Patch 3 is affected
  • Version 3.5.0 is affected
  • Version 3.4 Patch 4 is affected
  • Version 3.3 Patch 8 is affected
  • Version 3.5 Patch 1 is affected
  • Version 3.3 Patch 9 is affected
  • Version 3.4 Patch 5 is affected
  • Version 3.5 Patch 3 is affected
  • Version 3.5 Patch 2 is affected
  • Version 3.3 Patch 10 is affected

Exploits

The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.

References

Problem Types

  • Missing Authorization cwe