---
id: CVE-2026-102050
title: >-
  A Stack-based Buffer Overflow vulnerability in the l2cpd daemon of Juniper
  Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent
  attacker to cause a denial of service in Layer 2 control-plane processing via
  LLDP packe…
summary: >-
  A Stack-based Buffer Overflow vulnerability in the l2cpd daemon of Juniper
  Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent
  attacker to cause a denial of service in Layer 2 control-plane processing via
  LLDP packe…
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: '2026-10-14T17:17:59.737'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-102050'
references:
  - url: 'https://supportportal.juniper.net/JSA112187'
    label: sirt@juniper.net
tags:
  - nvd
ingestedAt: '2026-10-14T17:44:53.658Z'
---

## Overview

A Stack-based Buffer Overflow vulnerability in the l2cpd daemon of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker to cause a denial of service in Layer 2 control-plane processing via LLDP packets received on an interface configured for LLDP. Repeated triggering may disrupt LLDP and other Layer 2 control protocols across the device.

## Remediation

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