---
id: CVE-2025-5089
title: >-
  In a CVX cluster, an EOS switch connected to a CVX server is not resilient to
  certain malformed messages received from the connected CVX server
summary: >-
  In a CVX cluster, an EOS switch connected to a CVX server is not resilient to
  certain malformed messages received from the connected CVX server. Similarly,
  the CVX server is not resilient to certain malformed messages received from
  the c…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-20
published: '2026-06-05'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T21:10:00.190'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-5089'
references:
  - url: >-
      https://www.arista.com/en/support/advisories-notices/security-advisory/22868-security-advisory-0126
    label: psirt@arista.com
tags:
  - nvd
epss: 0.00235
epssPercentile: 0.13001
ingestedAt: '2026-09-30T21:25:07.737Z'
---

## Overview

In a CVX cluster, an EOS switch connected to a CVX server is not resilient to certain malformed messages received from the connected CVX server. Similarly, the CVX server is not resilient to certain malformed messages received from the connected EOS switch. This leads to either a Sysdb agent crash on the EOS device causing a soft reset of the switch or agent crashes on the CVX server causing instability of the CVX cluster. An attacker could use this behavior to create a denial of service (DoS) scenario. Note that this would require the attacker to already have a high privilege access to the connected device to be able to send custom TCP packets. EOS switches that are not connected to a CVX server are not impacted.

## Remediation

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