Multiple critical vulnerabilities in Cisco Identity Services Engine (ISE) and ISE Passive Identity Connector, including authentication bypass, remote code execution, SQL injection, and XXE injection, allow a remote attacker to compromise affected devices. The advisory rates the impact as Critical but does not provide specific CVSS scores, affected version ranges, or the exact fixed software versions. Cisco has released software updates to address these issues, and there are no available workarounds.
Multiple vulnerabilities in Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) could allow a remote attacker to bypass authentication to the REST API, achieve remote code execution, perform SQL injection, and conduct XML External Entity injection attacks on an affected device. For more information about these vulnerabilities, see the Details section of this advisory. Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-multi-hrP9jQSQ This advisory is part of a group of advisories. For a complete list of the advisories and links to them, see Cisco Advance Notification for Publication of September 16, 2026, Security Advisories . In addition, for further documentation of improvements and fixes in Cisco Identity Services Engine, see Cisco Identity Services Engine Security Hardening Release: September 2026 . <br/>Security Impact Rating: Critical <br/>CVE: CVE-2026-76423,CVE-2026-76424,CVE-2026-76425,CVE-2026-76426,CVE-2026-76427,CVE-2026-76428