---
id: CVE-2026-102049
title: >-
  A Stack-based Buffer Overflow vulnerability in the l2cpd process of Juniper
  Networks Junos OS and Junos OS Evolved allows an adjacent unauthenticated
  attacker to cause a denial of service or execute arbitrary code with root
  privileges vi…
summary: >-
  A Stack-based Buffer Overflow vulnerability in the l2cpd process of Juniper
  Networks Junos OS and Junos OS Evolved allows an adjacent unauthenticated
  attacker to cause a denial of service or execute arbitrary code with root
  privileges vi…
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: '2026-10-14T17:17:59.560'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-102049'
references:
  - url: 'https://supportportal.juniper.net/JSA112187'
    label: sirt@juniper.net
tags:
  - nvd
ingestedAt: '2026-10-14T17:44:53.657Z'
---

## Overview

A Stack-based Buffer Overflow vulnerability in the l2cpd process of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent unauthenticated attacker to cause a denial of service or execute arbitrary code with root privileges via LLDP traffic received on an interface with Unified Access Policy enabled.

## Remediation

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