CVE-2026-20190: Cisco Identity Services Engine

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

A vulnerability in Cisco ISE and ISE-PIC could allow an unauthenticated, remote attacker to view sensitive information on an affected device. This vulnerability is due to improper authorization checks when a resource is accessed. An attacker could exploit this vulnerability by sending crafted traffic to an affected device. A successful exploit could allow the attacker to gain access to sensitive information, including hashed credentials that could be used in future attacks.

Affected products

• Cisco Identity Services Engine: version 3.4.0 only; version 3.5.0 only
• Cisco Identity Services Engine Passive Identity Connector: version 3.4.0 only

Published 2026-06-17. Last modified 2026-09-25.