---
id: CVE-2026-86107
title: >-
  The VeloCloud Edge and Gateway exhibit an out-of-bounds write vulnerability
  when processing tunneled IP fragments between authenticated overlay neighbors
summary: >-
  The VeloCloud Edge and Gateway exhibit an out-of-bounds write vulnerability
  when processing tunneled IP fragments between authenticated overlay neighbors.
  This vulnerability impacts the VeloCloud VCMP tunnel protocol only.


  A successful …
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-787
vendor: Arista Networks
product: VeloCloud
affected:
  - VeloCloud >= 1.0.0.0 < 5.2.0.0
  - VeloCloud >= 5.2.0.0 < 5.2.7.0
  - VeloCloud >= 6.1.0.0 < 6.1.5.0
  - VeloCloud >= 6.4.0.0 < 6.4.2.0
  - velocloud_gateway >= 1.0.0.0 < 5.2.0.0
  - velocloud_gateway >= 5.2.0.0 < 5.2.7.0
  - velocloud_gateway >= 6.1.0.0 < 6.1.5.0
  - velocloud_gateway >= 6.4.0.0 < 6.4.2.0
published: '2026-09-16'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T19:10:09.867'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-86107'
references:
  - url: >-
      https://www.arista.com/en/support/advisories-notices/security-advisory/24736-security-advisory-0180
    label: psirt@arista.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-16T17:44:08.375443Z'
ingestedAt: '2026-09-16T10:53:53.925Z'
epss: 0.00367
epssPercentile: 0.27754
---

## Overview

The VeloCloud Edge and Gateway exhibit an out-of-bounds write vulnerability when processing tunneled IP fragments between authenticated overlay neighbors. This vulnerability impacts the VeloCloud VCMP tunnel protocol only.

A successful exploit can cause the affected process to terminate and restart, leading to a temporary disruption of traffic. Hosts on the internet that are unauthenticated and unable to form an overlay peer relationship can not trigger the vulnerable logic.

## Remediation

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