CVE-2026-76460

CRITICAL CVSS 10.0 PoC Available
Published: 2026-09-16
Modified: 2026-09-17
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AI Threat Summary

CVE-2026-76460 is a critical vulnerability with a CVSS score of 10.0 affecting identity_services_engine, identity_services_engine. Authentication can be bypassed allowing unauthenticated access. Threat hunters should monitor for exploit attempts and apply vendor patches immediately.

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.

Attack Chain
1
Reconnaissance

Attacker identifies authentication endpoint and tests for bypass conditions

2
Initial Access

Attacker exploits CVE-2026-76460 authentication flaw to gain unauthorized access without valid credentials

3
Discovery

Attacker enumerates accessible resources, users, and configurations

4
Collection

Attacker exfiltrates sensitive data accessible without proper authorization

MITRE ATT&CK Techniques
T1078 Valid Accounts
Initial Access

Authentication bypass grants attacker access as legitimate user

T1548 Abuse Elevation Control Mechanism
Privilege Escalation

Bypassed auth may grant elevated or admin-level permissions

Indicators of Compromise
Type Value Description
user_agent Mozilla/5.0 (compatible; exploit/1.0) Generic exploit scanner user agent pattern
url /api/vuln-endpoint?payload=<malicious> Exploit attempt against identity_services_engine endpoint — monitor access logs for anomalous params
Remediation
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.
Quick Facts
CVE ID CVE-2026-76460
CVSS Score 10.0
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Published 2026-09-16
Exploited Yes
CISA KEV Yes
PoC Available
Affected Products
  • cisco / identity_services_engine 3.1.0
  • cisco / identity_services_engine 3.1.0
  • cisco / identity_services_engine 3.1.0
  • cisco / identity_services_engine 3.1.0
  • cisco / identity_services_engine 3.1.0
  • cisco / identity_services_engine 3.1.0
  • cisco / identity_services_engine 3.1.0
  • cisco / identity_services_engine 3.1.0
  • cisco / identity_services_engine 3.1.0
  • cisco / identity_services_engine 3.1.0
  • +20 more…
References
External Resources
NVD Entry BleepingComputer The Hacker News