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ISE 802.1x Session Hijack Vulnerability

CVSS 3.1 3.8 LOWCheck source for fixed versionsKEV status unknown

cve-program · CVE-2026-20071

Published

A vulnerability in the SSID bring-your-own-device (BYOD) onboarding workflow of Cisco ISE could allow an unauthenticated, adjacent attacker to hijack the onboarding session of another user and access protected 802.1X networks.   This vulnerability is due to insufficient authentication checks that are performed while a user is being onboarded. An attacker could exploit this vulnerability by spoofing the legitimate user and triggering a redirection to the guest web portal. A successful exploit could allow the attacker to take over the user session and gain access to the protected 802.1X network.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-20071

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"
                }

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