---
id: CVE-2026-73439
title: >-
  On affected platforms running Arista EOS, if OpenConfig is configured and
  running a gNMI server on the system, and if gNSI Pathz is configured and a
  gNSI Pathz policy is present on the system, then gNMI may fail to correctly
  enforce the …
summary: >-
  On affected platforms running Arista EOS, if OpenConfig is configured and
  running a gNMI server on the system, and if gNSI Pathz is configured and a
  gNSI Pathz policy is present on the system, then gNMI may fail to correctly
  enforce the …
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-842
vendor: Arista Networks
product: EOS
affected:
  - EOS >= 4.33.2F <= 4.33.8M
  - EOS >= 4.34.0F <= 4.34.6M
  - EOS >= 4.35.0F <= 4.35.5M
  - EOS >= 4.36.0F <= 4.36.0.1F
published: '2026-09-16'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T04:17:59.307'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73439'
references:
  - url: >-
      https://www.arista.com/en/support/advisories-notices/security-advisory/24720-security-advisory-0164
    label: psirt@arista.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-16T14:51:48.504049Z'
epss: 0.00356
epssPercentile: 0.26706
ingestedAt: '2026-09-16T08:52:29.602Z'
---

## Overview

On affected platforms running Arista EOS, if OpenConfig is configured and running a gNMI server on the system, and if gNSI Pathz is configured and a gNSI Pathz policy is present on the system, then gNMI may fail to correctly enforce the rules in this policy if both a group rule and a user rule for the same path is present in the policy. Under certain conditions, this can lead to an authenticated user gaining unauthorized permission to read or write gNMI paths that the Pathz policy is intended to restrict.

## Remediation

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