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Critical · 10.0 Known exploited Scanner template Public exploit CVE-2026-76460 EUVD-2026-81122GHSA-25wc-3w28-q6vw

Cisco Identity Services Engine Authentication Bypass Vulnerability

Published Sep 16, 2026 · Updated Oct 7, 2026 · Assigned by cisco

Vendor: Cisco Product: Cisco Identity Services Engine Software Product: Cisco ISE Passive Identity Connector Category: Network devices

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.

Affected products

VendorProductAffectedFixed
Cisco Cisco Identity Services Engine Software 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, 3.4 Patch 1, 3.1.0 p10, 3.3 Patch 5, 3.3 Patch 6, 3.4 Patch 2, 3.3 Patch 7, 3.4 Patch 3, 3.5.0, 3.4 Patch 4, 3.3 Patch 8, 3.2 Patch 8, 3.5 Patch 1, 3.3 Patch 9, 3.2 Patch 9, 3.4 Patch 5, 3.5 Patch 3, 3.5 Patch … —
Cisco Cisco ISE Passive Identity Connector 3.4.0, 3.5.0 —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 1 repository

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Automated scanner template

A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.

Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.

Advisories 2

References