CVE-2026-76460
CriticalExploitedPublic exploitCisco Identity Services Engine Authentication Bypass Vulnerability
Published Sep 16, 2026 · Updated Oct 7, 2026 · Also known as EUVD-2026-81122, GHSA-25wc-3w28-q6vw
Key Facts
Patch immediately- CVE-2026-76460 is a critical-severity vulnerability (CVSS 10.0 v3.1) affecting Identity Services Engine (Cisco), Identity Services Engine Passive Identity Connector (Cisco), Cisco Identity Services Engine Software and 1 more product.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Sep 16, 2026. Public exploit code is available.
- EPSS estimates a 14% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
10.0
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
14%
Higher than 96.5% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2026-76460 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Sep 16, 2026 | Sep 19, 2026 | Not reported |
| Industry KEV feed | Sep 16, 2026 | Sep 19, 2026 | Not reported |
| CIRCL KEV | Sep 16, 2026 | Sep 19, 2026 | Not reported |
| ENISA EUVD | Sep 16, 2026 | n/a | Not reported |
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.
Affected Products
96 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Identity Services EngineCisco | 3.1.0, 3.1.0-patch1, 3.1.0-patch10, 3.1.0-patch11, 3.1.0-patch2, 3.1.0-patch3, 3.1.0-patch4, 3.1.0-patch5 | n/a |
| Identity Services Engine Passive Identity ConnectorCisco | 3.1.0, 3.1.0-patch1, 3.1.0-patch10, 3.1.0-patch11, 3.1.0-patch2, 3.1.0-patch3, 3.1.0-patch4, 3.1.0-patch5 | n/a |
| Cisco Identity Services Engine Software | >= 3.1.0 p8 | n/a |
| Cisco ISE Passive Identity Connector | >= 3.4.0 | n/a |
Timeline
Publicly disclosed
Sep 16, 2026
Added to CISA KEV
Sep 16, 2026
Added to Industry KEV feed
Sep 16, 2026
Added to CIRCL KEV
Sep 16, 2026
Added to ENISA EUVD
Sep 16, 2026
Last updated
Oct 7, 2026
Weakness Type
- CWE-648 Incorrect Use of Privileged APIs
References
FAQ
Common Questions.
A vulnerability in an API of Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to bypass authentication.
Affected: Identity Services Engine (Cisco) versions 3.1.0, 3.1.0-patch1, 3.1.0-patch10, 3.1.0-patch11, 3.1.0-patch2, 3.1.0-patch3, 3.1.0-patch4, 3.1.0-patch5; Identity Services Engine Passive Identity Connector (Cisco) versions 3.1.0, 3.1.0-patch1, 3.1.0-patch10, 3.1.0-patch11, 3.1.0-patch2, 3.1.0-patch3, 3.1.0-patch4, 3.1.0-patch5; Cisco Identity Services Engine Software versions >= 3.1.0 p8, among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Sep 16, 2026.
Yes. It was added on Sep 16, 2026 with a federal remediation due date of Sep 19, 2026.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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