#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
Vulnerability risk: Low
CVSSv4.0: 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
Vulnerable software:
Cisco Identity Services Engine (ISE)
ISE Passive Identity Connector (ISE-PIC)
Cisco Identity Services Engine (ISE)
ISE Passive Identity Connector (ISE-PIC)
Software vendor:
Cisco Systems, Inc
Cisco Systems, Inc
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.
Remediation
Install updates from vendor's website.