CVE-2026-101964
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Reachable Assertion in Juniper Networks Junos OS Routing Protocol Daemon

Publication date: 2026-10-14

Last updated on: 2026-10-14

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 adjacent attacker to cause an rpd crash via a crafted LDP packet received over an established LDP session.

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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-2026-101964
EUVD
EUVD-2026-101316

Affected Vendors & Products

Showing 15 associated CPEs
Vendor Product Version / Range
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 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
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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 issue in Juniper Networks Junos OS and Junos OS Evolved. It allows an adjacent attacker to crash the routing protocol daemon (rpd) by sending a specially crafted LDP packet over an established LDP session.

Detection Guidance

This vulnerability can be detected by monitoring for rpd crashes or unusual LDP packet handling. Check logs for rpd crashes and inspect LDP session traffic for malformed packets. Juniper recommends enabling logging and monitoring for LDP sessions and rpd stability.

Impact Analysis

This vulnerability can cause the rpd to crash, leading to a denial of service (DoS) condition. This disrupts network routing and may result in loss of connectivity or network instability for affected systems.

Compliance Impact

This vulnerability causes an rpd crash via crafted LDP packets, leading to service disruption. Such disruptions may impact data availability and integrity, which are critical for compliance with GDPR and HIPAA. However, specific compliance impacts are not detailed in the provided CVE data.

Mitigation Strategies

Update Junos OS or Junos OS Evolved to the latest patched version to address the Reachable Assertion vulnerability in the routing protocol daemon (rpd).

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