---
id: CVE-2026-73455
title: >-
  On affected platforms running Arista EOS with Open Shortest Path First version
  3 (OSPFv3) configured, a specially crafted packet can cause the OSPFv3 agent
  to restart unexpectedly.
summary: >-
  On affected platforms running Arista EOS with Open Shortest Path First version
  3 (OSPFv3) configured, a specially crafted packet can cause the OSPFv3 agent
  to restart unexpectedly.
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-130
vendor: Arista Networks
product: EOS
affected:
  - EOS >= 1.0.0 < 4.33.0F
  - EOS >= 4.33.0F <= 4.33.8M
  - EOS >= 4.34.0F <= 4.34.6M
  - EOS >= 4.35.0F <= 4.35.4M
  - EOS >= 4.36.0F <= 4.36.0.1F
published: '2026-09-16'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T19:09:28.447'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73455'
references:
  - url: >-
      https://www.arista.com/en/support/advisories-notices/security-advisory/24729-security-advisory-0173
    label: psirt@arista.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-16T17:56:02.507882Z'
ingestedAt: '2026-09-16T09:53:11.602Z'
epss: 0.00476
epssPercentile: 0.40135
---

## Overview

On affected platforms running Arista EOS with Open Shortest Path First version 3 (OSPFv3) configured, a specially crafted packet can cause the OSPFv3 agent to restart unexpectedly.

## Remediation

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