CVE-2026-76439: Cisco Identity Services Engine Event Injection Vulnerability
A vulnerability in the endpoint posture status reporting functionality of the guest portal web application of Cisco ISE could allow an unauthenticated, remote attacker to submit forged posture status events into the endpoint posture pipeline. This vulnerability is due to insufficient authentication on an internal interface that is exposed through the guest portal. An attacker could exploit this vulnerability by sending a crafted request to an affected system. A successful exploit could allow the attacker to manipulate the posture status on the affected system.
Affected Software
Event History
Frequently Asked Questions
Who can exploit this issue?
An unauthenticated remote attacker can exploit the issue by sending a crafted request to an affected Cisco ISE system. No privileges or user interaction are required.
What security impact could successful exploitation have?
Successful exploitation allows an attacker to submit forged endpoint posture status events into the posture pipeline and manipulate posture status on the affected system.
Which component is exposed to the vulnerable interface?
The insufficiently authenticated internal interface is exposed through the Cisco ISE guest portal web application, specifically in its endpoint posture status reporting functionality.