CVE-2026-102034
Awaiting Analysis Awaiting Analysis - Queue

Reachable Assertion in Juniper Networks Junos OS and Junos OS Evolved

Publication date: 2026-10-14

Last updated on: 2026-10-14

Assigner: Juniper Networks, Inc.

Description
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.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-10-14
Last Modified
2026-10-14
Generated
2026-10-19
AI Q&A
2026-10-15
EPSS Evaluated
2026-10-18
NVD
CVE-2026-102034
EUVD
EUVD-2026-101359

Affected Vendors & Products

Showing 17 associated CPEs
Vendor Product Version / Range
Juniper Networks Junos OS 0
Juniper Networks Junos OS 23.4
Juniper Networks Junos OS 24.2
Juniper Networks Junos OS 24.4
Juniper Networks Junos OS 25.2
Juniper Networks Junos OS 25.4
Juniper Networks Junos OS 26.2
Juniper Networks Junos OS Evolved 0
Juniper Networks Junos OS Evolved 23.4
Juniper Networks Junos OS Evolved 24.2
Juniper Networks Junos OS Evolved 24.4
Juniper Networks Junos OS Evolved 25.2
Juniper Networks Junos OS Evolved 25.4
Juniper Networks Junos OS Evolved 26.2
Juniper Networks Junos OS Evolved 23.4X100
Juniper Networks Junos OS Evolved 25.2X100
Juniper Networks Junos OS Evolved 25.4X300

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-617 The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability is a Reachable Assertion issue in Juniper Networks Junos OS and Junos OS Evolved. It exists in the l2ald daemon and can be triggered by an attacker with access to a configured ICCP peer sending a malformed MC-LAG message. This causes a denial of service condition.

Detection Guidance

This vulnerability involves a Reachable Assertion in the l2ald daemon due to malformed MC-LAG messages. Detection requires monitoring for unexpected crashes or abnormal behavior in the l2ald process on Juniper devices running affected Junos OS or Junos OS Evolved versions.

Impact Analysis

An attacker could exploit this to crash the l2ald daemon, leading to network disruption. This affects systems using Junos OS or Junos OS Evolved with ICCP peer configurations, potentially causing service outages.

Compliance Impact

The vulnerability causes a denial of service via malformed messages, which could disrupt network availability. This may impact compliance with standards requiring high availability, such as GDPR (availability principle) or HIPAA (accessibility of critical systems).

Mitigation Strategies

Apply the latest security patches from Juniper Networks to address the Reachable Assertion vulnerability in the l2ald daemon. Disable ICCP peer configurations if not required. Monitor network traffic for malformed MC-LAG messages and restrict access to ICCP peers.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-102034. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart