Auth bypass in Cisco Identity Services Engine Software
CVE-2026-20193
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.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.002 (11.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 11th percentile — 11.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Cisco Identity Services Engine Software — versions 3.3.0, 3.3 Patch 2, 3.3 Patch 1
- Cisco Identity Services Engine — versions 3.3.0, 3.4.0, 3.5.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-20193?
- CVE-2026-20193 is a medium-severity vulnerability in Cisco Identity Services Engine Software, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-05-06.
- How severe is CVE-2026-20193?
- Medium severity. CVSS v3 base score is 4.3 out of 10.