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: 5.1 [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]

CVE-ID: CVE-2026-20029

CWE-ID: CWE-611

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

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.

Affected software

Cisco Identity Services Engine (ISE)
ISE Passive Identity Connector (ISE-PIC)

How to mitigate CVE-2026-20029

Install updates from vendor's website.

Cisco Identity Services Engine (ISE) - addressed in versions 3.2 P8, 3.3 Patch 8, 3.4 Patch 4
ISE Passive Identity Connector (ISE-PIC) - addressed in versions 3.2 Patch 8, 3.3 Patch 8, 3.4 Patch 4

External References

Related Security Bulletins