Medium severity · published May 6, 2026
CVE-2026-20193
Cisco Identity Services Engine Authentication Bypass Vulnerability
4.3
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 13% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CI
Cisco Identity Services Engine Software · Cisco
3.3.0; 3.3 Patch 2; 3.3 Patch 1; 3.3 Patch 3; 3.4.0; 3.3 Patch 4; +15 more · source: vendor
IS
Identity Services Engine · Cisco
through 3.2.0; 3.3.0; 3.3.0; 3.3.0; 3.3.0; 3.3.0; +15 more · source: NVD
Affected product
CI
Cisco Identity Services Engine Software
Cisco
More from Cisco Identity Services Engine Software
10.0
CVE-2026-76460
Cisco Identity Services Engine Authentication Bypass Vulnerability
10.0
CVE-2025-20337
Cisco ISE API Unauthenticated Remote Code Execution Vulnerability
10.0
CVE-2025-20281
Cisco ISE API Unauthenticated Remote Code Execution Vulnerability
10.0
CVE-2026-76423
Cisco ISE API Authentication Bypass Vulnerability
10.0
CVE-2026-20130
Cisco Identity Services Engine Hardening Release - Improper Neutralization Vulnerabilities