---
id: CVE-2026-75943
title: >-
  A brief (milliseconds to seconds) traffic leak may occur when an authenticated
  supplicant is removed, either via the clear dot1x host all CLI command or due
  to a supplicant timeout
summary: >-
  A brief (milliseconds to seconds) traffic leak may occur when an authenticated
  supplicant is removed, either via the clear dot1x host all CLI command or due
  to a supplicant timeout. During this window, the supplicant's traffic may pass
  w…
severity: low
cvss: 2.6
cvssVector: 'CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-459
vendor: Arista Networks
product: EOS
affected:
  - EOS >= 4.36.0 <= 4.36.1F
  - EOS >= 4.35.0 <= 4.35.5M
  - EOS >= 4.34.0 <= 4.34.7.1M
  - EOS >= 0.0.0 <= 4.33.9M
published: '2026-09-14'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T20:36:52.890'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-75943'
references:
  - url: >-
      https://www.arista.com/en/support/advisories-notices/security-advisory/24706-security-advisory-0150
    label: psirt@arista.com
tags:
  - nvd
  - cve.org
epss: 0.00203
epssPercentile: 0.0909
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-15T13:48:12.132411Z'
ingestedAt: '2026-09-14T23:17:06.518Z'
---

## Overview

A brief (milliseconds to seconds) traffic leak may occur when an authenticated supplicant is removed, either via the clear dot1x host all CLI command or due to a supplicant timeout. During this window, the supplicant's traffic may pass without ACL enforcement.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.