CVE-2026-20309
Cisco Identity Services Engine Cross-Site Scripting Vulnerability
Description
A vulnerability in the web-based management interface of Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to conduct a reflected cross-site scripting (XSS) attack against a user of the interface. This vulnerability exists because the web-based management interface does not properly validate user-supplied input. An attacker could exploit this vulnerability by persuading a user of the interface to click a crafted link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information.
Weakness: CWE-79
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Cisco | Cisco Identity Services Engine (ISE) Check your version | Identity / IAM / MFA | cna-assigner |
Vendor-reported products (1)
- Cisco · Cisco Identity Services Engine Software
Vendor advisory
Cisco Identity Services Engine Cross-Site Scripting Vulnerability
Cisco’s rating: Medium (advisory CVSS 6.1) · Published Sep 16, 2026
Bug ID: CSCwt04611
The vendor’s rating applies to the whole advisory and can differ from this CVE’s own CVSS severity. Where this comes from