CVE-2026-101996
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Reachable Assertion in Juniper Networks Junos OS MC-LAG/ICCP Daemon

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 devices configured for MC-LAG/ICCP allows an adjacent attacker to cause a denial of service via an inconsistent ICCP peer message.

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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-2026-101996
EUVD
EUVD-2026-101476

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

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Exploitability

CWE
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KEV
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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.

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Executive Summary

This vulnerability is a Reachable Assertion flaw in the l2ald daemon of Juniper Networks Junos OS and Junos OS Evolved devices configured for MC-LAG/ICCP. An adjacent attacker can exploit it by sending an inconsistent ICCP peer message, causing a denial of service.

Impact Analysis

The vulnerability allows an attacker to disrupt network services by triggering a denial of service, potentially leading to network outages or degraded performance for affected Juniper devices using MC-LAG/ICCP.

Compliance Impact

This vulnerability causes a denial of service via an inconsistent ICCP peer message, which could disrupt network services. Such disruptions may impact systems handling sensitive data, potentially violating availability requirements in GDPR and HIPAA. However, the provided CVE details do not explicitly address compliance implications.

Mitigation Strategies

Update Junos OS or Junos OS Evolved to the latest patched version to address the Reachable Assertion vulnerability in the l2ald daemon.

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