CVE-2026-20071
ISE 802.1x Session Hijack Vulnerability
LOW 3.8
At a glance
- Source
- NVD
- EPSS
- EPSS 0.23 % · percentile 14 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- cisco
- NVD status
- Awaiting Analysis
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.
Weaknesses (CWE)
- CWE-290 — Authentication Bypass by Spoofing
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | LOW 3.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N | cisco |
| CVSS 3.1 | LOW 3.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N | NVD · psirt@cisco.com (Secondary) |
European references
- ENISA EUVD · EUVD-2026-81158
- GCVE · GCVE-0-2026-20071
Affected products
| Product | Versions |
|---|---|
| Cisco · Cisco Identity Services Engine Software | affected 3.1.0 ; affected 3.1.0 p1 ; affected 3.1.0 p3 ; affected 3.1.0 p2 ; affected 3.2.0 ; affected 3.1.0 p4 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |