CVE-2026-76423: Cisco ISE API Authentication Bypass Vulnerability
A vulnerability in the REST API of Cisco ISE and Cisco ISE-PIC could allow an unauthenticated, remote attacker to gain administrative access to an affected device. This vulnerability is due to the REST API web service being exposed with insufficient authorization checks. An attacker could exploit this vulnerability by sending a crafted HTTP request to the exposed REST API port. A successful exploit could allow the attacker to read and modify ISE configuration and identity data with administrative privileges.
Affected Software
Event History
Frequently Asked Questions
Who is exposed to this vulnerability?
Cisco ISE and Cisco ISE-PIC devices are exposed when their REST API web service is accessible to a remote attacker. The issue is in insufficient authorization checks on the exposed REST API.
What does an attacker need to exploit it?
An attacker does not need authentication or user interaction. Exploitation requires sending a crafted HTTP request to the exposed REST API port.
What could an attacker do after successful exploitation?
A successful attacker could obtain administrative access and read or modify ISE configuration and identity data.