CVE-2026-102064

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Reachable Assertion in Juniper Junos OS via BGP MCAST-VPN Updates

Publication date: 2026-10-14

Last updated on: 2026-10-16

Assigner: Juniper Networks, Inc.

Description

A Reachable Assertion vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an attacker to cause rpd crash via malformed BGP MCAST-VPN updates from a configured eBGP peer.

CVSS Scores

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Meta Information

Published

2026-10-14

Last Modified

2026-10-16

Generated

2026-10-19

AI Q&A

2026-10-15

EPSS Evaluated

2026-10-18

NVD

CVE-2026-102064

EUVD

EUVD-2026-101475

Affected Vendors & Products

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

KEV

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

Executive Summary

This is a Reachable Assertion vulnerability in Juniper Networks Junos OS and Junos OS Evolved. It allows an attacker to crash the routing protocol daemon (rpd) by sending malformed BGP MCAST-VPN updates from a configured eBGP peer.

Detection Guidance

This vulnerability can be detected by monitoring for crashes in the routing protocol daemon (rpd) on Juniper Junos OS or Junos OS Evolved systems. Check logs for rpd crashes and inspect BGP MCAST-VPN update traffic from eBGP peers for malformed packets. Juniper may provide specific diagnostic commands in their security advisories.

Impact Analysis

The vulnerability can cause rpd to crash, leading to network disruption or downtime. This may result in loss of routing functionality and potential service outages for affected systems.

Compliance Impact

This vulnerability does not directly impact compliance with GDPR, HIPAA, or similar standards as it involves a routing protocol daemon crash due to malformed BGP updates. Compliance risks would arise only if the crash leads to service disruption affecting data processing or availability, which is not specified in the CVE details.

Mitigation Strategies

Apply the latest Junos OS or Junos OS Evolved patches from Juniper Networks to address the Reachable Assertion vulnerability in rpd. Monitor BGP MCAST-VPN updates from eBGP peers for malformed packets and restrict untrusted BGP peer connections.

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