---
id: CVE-2026-102034
title: >-
  A Reachable Assertion vulnerability in the l2ald daemon of Juniper Networks
  Junos OS and Junos OS Evolved allows an attacker with access to a configured
  ICCP peer to cause a denial of service via a malformed MC-LAG message.
summary: >-
  A Reachable Assertion vulnerability in the l2ald daemon of Juniper Networks
  Junos OS and Junos OS Evolved allows an attacker with access to a configured
  ICCP peer to cause a denial of service via a malformed MC-LAG message.
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-617
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T17:17:57.370'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-102034'
references:
  - url: 'https://supportportal.juniper.net/JSA112187'
    label: sirt@juniper.net
tags:
  - nvd
ingestedAt: '2026-10-14T17:44:53.653Z'
---

## Overview

A Reachable Assertion vulnerability in the l2ald daemon of Juniper Networks Junos OS and Junos OS Evolved allows an attacker with access to a configured ICCP peer to cause a denial of service via a malformed MC-LAG message.

## Remediation

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