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CVE-2026-76460

Cisco Identity Services Engine Authentication Bypass Vulnerability

  • Critical 10.0
  • Exploited: added to CISA KEV 16 Sep 2026

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.

Key facts

Published
16 Sep 2026
Last changed
7 Oct 2026
Assigned by
cisco
KEV added
16 Sep 2026
KEV fix due
19 Sep 2026
EPSS
75.599% likely to be exploited in the next 30 days, higher than 99.527% of CVEs (scores for 15 Nov 2026)
SSVC (CISA)
Exploitation: active; Automatable: yes; Technical impact: total

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

  • 10.0CVSS 3.1, Criticalfrom the CNA (cisco)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

What to do

  • 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.CISA KEV required action

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

VendorProductVersions
CiscoCisco Identity Services Engine Software
  • Default status: unknown
  • 3.1.0 p8 (affected)
  • 3.1.0 p9 (affected)
  • 3.3 Patch 2 (affected)
  • 3.3 Patch 1 (affected)
  • 3.3 Patch 3 (affected)
  • 3.4.0 (affected)
  • 3.2.0 p7 (affected)
  • 3.3 Patch 4 (affected)
  • 3.4 Patch 1 (affected)
  • 3.1.0 p10 (affected)
  • 3.3 Patch 5 (affected)
  • 3.3 Patch 6 (affected)
  • 3.4 Patch 2 (affected)
  • 3.3 Patch 7 (affected)
  • 3.4 Patch 3 (affected)
  • 3.5.0 (affected)
  • 3.4 Patch 4 (affected)
  • 3.3 Patch 8 (affected)
  • 3.2 Patch 8 (affected)
  • 3.5 Patch 1 (affected)
  • 3.3 Patch 9 (affected)
  • 3.2 Patch 9 (affected)
  • 3.4 Patch 5 (affected)
  • 3.5 Patch 3 (affected)
  • 3.5 Patch 2 (affected)
  • 3.3 Patch 10 (affected)
  • 3.3 Patch 11 (affected)
  • 3.4 Patch 6 (affected)
  • 3.2 Patch 10 (affected)
  • 3.1.0 p11 (affected)
CiscoCisco ISE Passive Identity Connector
  • Default status: unknown
  • 3.4.0 (affected)
  • 3.5.0 (affected)

Timeline

  1. 16 Sep 2026 Added to the CISA KEV catalogue
  2. 16 Sep 2026 Published

Weakness

References