CVE-2026-20193

Cisco Identity Services Engine Authentication Bypass Vulnerability

Published May 6, 2026 CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Description
A vulnerability in the RADIUS Policy API endpoints of Cisco ISE could allow an&nbsp;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&nbsp;read access to sensitive RADIUS Policy details that are restricted for their role.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Cisco
Cisco identity Services Engine Software
Vendors & Products Cisco
Cisco identity Services Engine Software
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description A vulnerability in the RADIUS Policy API endpoints of Cisco ISE could allow an&nbsp;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&nbsp;read access to sensitive RADIUS Policy details that are restricted for their role.
Title Cisco Identity Services Engine Authentication Bypass Vulnerability
Weaknesses CWE-862
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
cisco
Published
Updated
May 6, 2026, 5:48 PM
Reserved
Oct 8, 2025, 11:59 AM
Status
Analyzed
Published
May 6, 2026, 5:16 PM
Modified
Oct 26, 2026, 7:10 PM