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Cisco ISE API Authentication Bypass Vulnerability

CVSS 3.1 10.0 CRITICALCheck source for fixed versionsKEV status unknown

cve-program · CVE-2026-76423

Published

A vulnerability in the REST API of Cisco ISE and Cisco ISE-PIC could allow an unauthenticated, remote attacker to gain administrative access to an affected device. This vulnerability is due to the REST API web service being exposed with insufficient authorization checks. An attacker could exploit this vulnerability by sending a crafted HTTP request to the exposed REST API port. A successful exploit could allow the attacker to read and modify ISE configuration and identity data with administrative privileges.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-76423

Published

Cisco Identity Services Engine Software

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Cisco",
                    "product": "Cisco Identity Services Engine Software",
                    "versions": [
                        {
                            "version": "3.1.0",
                            "status": "affected"
                        },
                        {
                            "version": "3.1.0 p1",
                            "status": "affected"
                        },
                        {
                            "version": "3.1.0 p3",
                            "status": "affected"
                        },
                        {
                            "version": "3.1.0 p2",
                            "status": "affected"
                        },
                        {
                            "version": "3.2.0",
                            "status": "affected"
                        },
                        {
                            "version": "3.1.0 p4",
                            "status": "affected"
                        },
                        {
                            "version": "3.1.0 p5",
                            "status": "affected"
                        },
                        {
                            "version": "3.2.0 p1",
                            "status": "affected"
                        },
                        {
                            "version": "3.1.0 p6",
                            "status": "affected"
                        },
                        {
                            "version": "3.2.0 p2",
                            "status": "affected"
                        },
                        {
                            "version": "3.1.0 p7",
                            "status": "affected"
                        },
                        {
                            "version": "3.3.0",
                            "status": "affected"
                        },
                        {
                            "version": "3.2.0 p3",
                            "status": "affected"
                        },
                        {
                            "version": "3.2.0 p4",
                            "status": "affected"
                        },
                        {
                            "version": "3.1.0 p8",
                            "status": "affected"
                        },
                        {
                            "version": "3.2.0 p5",
                            "status": "affected"
                        },
                        {
                            "version": "3.2.0 p6",
                            "status": "affected"
                        },
                        {
                            "version": "3.1.0 p9",
                            "status": "affected"
                        },
                        {
                            "version": "3.3 Patch 2",
                            "status": "affected"
                        },
                        {
                            "version": "3.3 Patch 1",
                            "status": "affected"
                        },
                        {
                            "version": "3.3 Patch 3",
                            "status": "affected"
                        },
                        {
                            "version": "3.4.0",
                            "status": "affected"
                        },
                        {
                            "version": "3.2.0 p7",
                            "status": "affected"
                        },
                        {
                            "version": "3.3 Patch 4",
                            "status": "affected"
                        },
                        {
                            "version": "3.4 Patch 1",
                            "status": "affected"
                        },
                        {
                            "version": "3.1.0 p10",
                            "status": "affected"
                        },
                        {
                            "version": "3.3 Patch 5",
                            "status": "affected"
                        },
                        {
                            "version": "3.3 Patch 6",
                            "status": "affected"
                        },
                        {
                            "version": "3.4 Patch 2",
                            "status": "affected"
                        },
                        {
                            "version": "3.3 Patch 7",
                            "status": "affected"
                        },
                        {
                            "version": "3.4 Patch 3",
                            "status": "affected"
                        },
                        {
                            "version": "3.5.0",
                            "status": "affected"
                        },
                        {
                            "version": "3.4 Patch 4",
                            "status": "affected"
                        },
                        {
                            "version": "3.3 Patch 8",
                            "status": "affected"
                        },
                        {
                            "version": "3.2 Patch 8",
                            "status": "affected"
                        },
                        {
                            "version": "3.5 Patch 1",
                            "status": "affected"
                        },
                        {
                            "version": "3.3 Patch 9",
                            "status": "affected"
                        },
                        {
                            "version": "3.2 Patch 9",
                            "status": "affected"
                        },
                        {
                            "version": "3.4 Patch 5",
                            "status": "affected"
                        },
                        {
                            "version": "3.5 Patch 3",
                            "status": "affected"
                        },
                        {
                            "version": "3.5 Patch 2",
                            "status": "affected"
                        },
                        {
                            "version": "3.3 Patch 10",
                            "status": "affected"
                        },
                        {
                            "version": "3.3 Patch 11",
                            "status": "affected"
                        },
                        {
                            "version": "3.4 Patch 6",
                            "status": "affected"
                        },
                        {
                            "version": "3.2 Patch 10",
                            "status": "affected"
                        },
                        {
                            "version": "3.1.0 p72",
                            "status": "affected"
                        },
                        {
                            "version": "3.1.0 p11",
                            "status": "affected"
                        },
                        {
                            "version": "3.3 Patch 12",
                            "status": "affected"
                        }
                    ],
                    "defaultStatus": "unknown"
                }

Cisco ISE Passive Identity Connector

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Cisco",
                    "product": "Cisco ISE Passive Identity Connector",
                    "versions": [
                        {
                            "version": "3.2.0",
                            "status": "affected"
                        },
                        {
                            "version": "3.1.0",
                            "status": "affected"
                        },
                        {
                            "version": "3.3.0",
                            "status": "affected"
                        },
                        {
                            "version": "3.4.0",
                            "status": "affected"
                        },
                        {
                            "version": "3.5.0",
                            "status": "affected"
                        }
                    ],
                    "defaultStatus": "unknown"
                }

Original source record · Cite this exact observation · Complete original publisher JSON

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