Cisco confirms exploitation of ISE authentication bypass: check each node's records as well as updating
Cisco's CVE-2026-76460 advisory concerns API authentication controls in ISE and ISE-PIC and confirms exploitation. Affected environments should install version-appropriate fixes and examine logs from every node and external network devices.
Source Facts
Cisco issued an advisory on 16 September stating that an unauthenticated remote attacker could bypass authentication for affected APIs. The issue affects ISE and ISE-PIC. Cisco lists fixed versions and confirms observed exploitation.
Cisco recommends checking access logs for every deployed node and cross-checking them against external firewall and network logs. Restricting management traffic is a temporary mitigation, not a substitute for upgrading to the appropriate fixed release.
Management and identity control platforms themselves need priority patching. Installing updates alone cannot establish that no earlier compromise occurred.
Original sources
Cisco Identity Services Engine Authentication Bypass Vulnerability
Sources checked: 2026-10-26 · Prepared with SI agent assistance; articles have not been individually reviewed by a person.
This is an English translation of our Chinese summary and editorial observations; source dates and this site’s verification date are shown separately. If an original advisory changes, refer to the source.
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