CVE-2026-20029
Cisco Identity Services Engine XML External Entity Processing Information Disclosure Vulnerability
Description
A vulnerability in the licensing features of Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) could allow an authenticated, remote attacker with administrative privileges to gain access to sensitive information. This vulnerability is due to improper parsing of XML that is processed by the web-based management interface of Cisco ISE and Cisco ISE-PIC. An attacker could exploit this vulnerability by uploading a malicious file to the application. A successful exploit could allow the attacker to read arbitrary files from the underlying operating system that could include sensitive data that should otherwise be inaccessible even to administrators. To exploit this vulnerability, the attacker must have valid administrative credentials.
Weakness: CWE-611
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 XML External Entity Processing Information Disclosure Vulnerability
Cisco’s rating: Medium (advisory CVSS 4.9) · Published Jan 7, 2026
Bug ID: CSCwq79739
The vendor’s rating applies to the whole advisory and can differ from this CVE’s own CVSS severity. Where this comes from