XML External Entity injection in Cisco Identity Services Engine (ISE) and ISE Passive Identity Connector (ISE-PIC) - CVE-2026-20029

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Main Vulnerability Database Vulnerabilities #VU121071

XML External Entity injection in Cisco Identity Services Engine (ISE) and ISE Passive Identity Connector (ISE-PIC) - CVE-2026-20029

Published: January 7, 2026 / Updated: January 13, 2026


Vulnerability identifier: #VU121071
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:N/SC:L/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-20029
CWE-ID: CWE-611
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Cisco Systems, Inc
Affected software:
Cisco Identity Services Engine (ISE)
ISE Passive Identity Connector (ISE-PIC)

Detailed vulnerability description

The vulnerability allows a remote user to gain access to sensitive information.

The vulnerability exists due to insufficient validation of user-supplied XML input. A remote privileged user can pass a specially crafted XML code to the affected application and view contents of arbitrary files on the system or initiate requests to external systems.


How to mitigate CVE-2026-20029

Install updates from vendor's website.

Sources