CVE-2026-20071
ISE 802.1x Session Hijack Vulnerability
Severity
Low 3.8
CVSS 3.1
Exploited
Not listed
EPSS
0.001
4.2th percentile
Discovered by
Third party
Vendor-published field
Published
Sep 16, 2026
Assigned by cisco
Description
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.
Weakness: CWE-290
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Cisco | Cisco Identity Services Engine (ISE) | Identity / IAM / MFA | cna-assigner |
Vendor-reported products (1)
- Cisco · Cisco Identity Services Engine Software