Status: KEV | Advisory ID: CVE-2026-76460
| CVE | CVE-2026-76460 |
| Vulnerability Name | Cisco Identity Services Engine Incorrect Use of Privileged APIs Vulnerability |
| CVSS Score / Version | 10.0 (Critical) / CVSS v3.1 |
| Updated | 2026-09-25 |
| CVSS Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| CVSS Prose | attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is changed; confidentiality impact is high; integrity impact is high; availability impact is high. |
| Affected products | Cisco Identity Services Engine |
| Exploitation status | The Cisco PSIRT is aware of active exploitation of this vulnerability. |
| Classified as | CWE-648 (Incorrect Use of Privileged APIs) |
| KEV listing | Added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2026-09-16. |
| Exploitation prediction (EPSS) | 14.03% probability of exploitation in the next 30 days (96% percentile) -- FIRST.org's EPSS model. |
| Federal remediation deadline | 2026-09-19 (CISA KEV, Binding Operational Directive). |
| Vendor | Product | Affected Versions | Patch Status |
|---|---|---|---|
| Cisco | Identity Services Engine |
| Subsystems | Industrial Network - Routers/Firewalls |
| Sectors | Critical Manufacturing, Energy, Transportation Systems, Water and Wastewater Systems |
A vulnerability in an API of Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to bypass authentication.
This vulnerability is due to insufficient authentication control on an API endpoint. An attacker could exploit this vulnerability by sending a crafted request to an affected API endpoint. A successful exploit could allow the attacker to gain unauthorized access to the affected device by bypassing the web-based management interface.
There are no workarounds that address this vulnerability. However, there is a mitigation. To prevent remote exploitation of this vulnerability, use infrastructure access control lists (iACLs) to allow only required management and control plane traffic that is destined to the affected device. Cisco has published fixed releases: Cisco ISE or ISE-PIC 3.1 -> 3.1 Patch 12, 3.2 -> 3.2 Patch 11, 3.3 -> 3.3 Patch 12, 3.4 -> 3.4 Patch 7, 3.5 -> 3.5 Patch 4.
| Field | Value |
|---|---|
| KEV Link | https://www.cisa.gov/known-exploited-vulnerabilities-catalog |
| Date Added to KEV | 2026-09-16 |
| Required Action Due Date | 2026-09-19 |
| Required Action | Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines. |