---
id: CVE-2026-102055
title: >-
  A Stack-based Buffer Overflow vulnerability in the cfmd process of Juniper
  Networks Junos OS on MX Series and Junos OS Evolved on PTX Series platforms
  allows an unauthenticated adjacent-network attacker to execute arbitrary code
  as root …
summary: >-
  A Stack-based Buffer Overflow vulnerability in the cfmd process of Juniper
  Networks Junos OS on MX Series and Junos OS Evolved on PTX Series platforms
  allows an unauthenticated adjacent-network attacker to execute arbitrary code
  as root …
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-121
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T17:18:00.590'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-102055'
references:
  - url: 'https://supportportal.juniper.net/JSA112187'
    label: sirt@juniper.net
tags:
  - nvd
ingestedAt: '2026-10-14T17:44:53.659Z'
---

## Overview

A Stack-based Buffer Overflow vulnerability in the cfmd process of Juniper Networks Junos OS on MX Series and Junos OS Evolved on PTX Series platforms allows an unauthenticated adjacent-network attacker to execute arbitrary code as root or cause denial of service via a specific CFM Message sent to a configured down-MEP with enhanced CFM mode enabled.

## Remediation

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