Critical 10.0Known exploited (CISA KEV)Published Sep 16, 2026

CVE-2026-76460Cisco Identity Services Engine Authentication Bypass Vulnerability

Updated under an hour ago (2026-10-19 04:50 UTC)

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It affects Cisco Identity Services Engine Software and 3 other products. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Sep 16, 2026; federal agencies had to remediate by Sep 19, 2026. Treat that date as your deadline.

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Every CVE for Cisco Identity Services Engine Software

Exploited in the last 30 days

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.

CVSS: 10.0 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness (CWE): CWE-648
Known exploited: Added to CISA KEV Sep 16, 2026; federal remediation due Sep 19, 2026Apply 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.
EPSS (exploitation in the next 30 days): 14.03% (percentile 97)
Assigned by: cisco
NVD analysis: Analyzed
Record last updated: Oct 7, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Cisco Cisco Identity Services Engine Software cisco:identity_services_engine_software (from the name)	3.1.0 p8; 3.1.0 p9; 3.3 Patch 2; 3.3 Patch 1; 3.3 Patch 3; 3.4.0; 3.2.0 p7; 3.3 Patch 4; and 22 more ranges	CNA record
Cisco Cisco ISE Passive Identity Connector cisco:ise_passive_identity_connector (from the name)	3.4.0; 3.5.0	CNA record
cisco identity_services_engine cisco:identity_services_engine	3.1.0; 3.1.0; 3.1.0; 3.1.0; 3.1.0; 3.1.0; 3.1.0; 3.1.0; and 38 more ranges	NVD
cisco identity_services_engine_passive_identity_connector cisco:identity_services_engine_passive_identity_connector	3.1.0; 3.1.0; 3.1.0; 3.1.0; 3.1.0; 3.1.0; 3.1.0; 3.1.0; and 34 more ranges	NVD

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ISE-ABP-VNSW7Tn5mitigation, vendor-advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-76460us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.