Privileged API Bypass in Cisco Identity Services Engine

Catalog analysis: CISA added this entry on September 16, 2026. The entry reflects catalog information retrieved on September 17, 2026, not a snapshot archived on the inclusion date. This site’s publication date is shown separately. Check current vendor guidance before acting.

What the vulnerability is

CVE-2026-76460 is an incorrect use of privileged APIs (CWE-648) affecting Cisco Identity Services Engine (ISE) and the Cisco ISE Passive Identity Connector (ISE-PIC). This flaw could allow an unauthenticated, remote attacker to bypass the web-based management interface and gain unauthorized access to the affected device.

Exposure and applicability

This vulnerability applies to organizations deploying Cisco ISE or the Cisco ISE Passive Identity Connector. The primary exposure path is via the web-based management interface. Because the vulnerability allows for unauthenticated remote access, assets with direct internet exposure or those accessible from untrusted network segments are at higher risk.

Remediation priorities

Our analysis suggests prioritizing remediation based on the asset’s network positioning and its role in identity management. We recommend the following priority sequence:

1. Identify Affected Assets: Locate all instances of Cisco ISE and ISE-PIC within the environment to determine the total attack surface.
2. Assess Exposure: Prioritize devices that are internet-facing or reside in zones with minimal internal segmentation, as these provide the most direct path for remote attackers.
3. Apply Vendor Mitigations: Implement the corrective actions specified in the Cisco security advisory.
4. Perform Forensic Triage: Given that this vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog and requires forensic triage, defenders should examine logs for unauthorized access attempts to the management interface prior to and during the patching window.

How to validate remediation

To ensure exposure has been reduced, defenders must move beyond simple version checks. Validation should include:

• Configuration Audit: Confirm that the specific mitigations outlined by Cisco have been applied across all identified nodes.
• Access Control Verification: Verify that the web-based management interface is restricted to authorized administrative networks via ACLs or firewalls, reducing the likelihood of remote exploitation regardless of patch status.
• Log Analysis: Monitor for continued attempts to access privileged APIs through the management interface to ensure no unauthorized sessions persist post-remediation.

Limits and open questions

Applying vendor mitigations could reduce the likelihood of exploitation, but residual risk remains if administrative interfaces are left exposed to broad network segments. It is currently unknown whether this vulnerability has been utilized in ransomware campaigns. Furthermore, while CISA provides a deadline for federal agencies, non-federal organizations must determine their own remediation timelines based on their specific risk profile and asset criticality.

Source and editorial note

CVE-2026-76460: Cisco Identity Services Engine Incorrect Use of Privileged APIs Vulnerability · Source date: September 16, 2026 · Retrieved September 17, 2026.

Material facts are tied to the cited primary source. Recommendations are independent defensive analysis unless attributed to the source. Confirm consequential decisions against current authoritative guidance.

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