CVE-2026-76423
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.
- Published Sep 16, 2026
- CVSS 10.0 critical
- 0.6% chance of exploitation in the next 30 days (EPSS)
Affected software
In the news
- Vulnerabilities Impacting Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) – CVE-2026-20192, CVE-2026-76423 and CVE-2026-76460 Canadian Centre for Cyber Security ·
- Cisco Warns of New Zero-Day ISE Auth Bypass (CVSS 10.0) Exploited in Active Attacks The Hacker News ·
- Multiple vulnerabilities in Cisco products CERT-FR ·