CVE-2026-101975

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Reachable Assertion in Juniper Junos OS OSPF Routing

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 OSPF peer to cause a denial of service via OSPF traffic processed while OSPF Source Packet Routing best-route Prefix-SID installation is configured.

CVSS Scores

EPSS Scores

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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-2026-101975

EUVD

EUVD-2026-101413

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 vulnerability is a Reachable Assertion issue in Juniper Networks Junos OS and Junos OS Evolved. It occurs in the routing protocol daemon (rpd) when OSPF Source Packet Routing best-route Prefix-SID installation is configured. An adjacent OSPF peer can send malicious OSPF traffic that triggers this vulnerability, causing a denial of service.

Detection Guidance

This vulnerability is specific to Juniper Junos OS and Junos OS Evolved with OSPF Source Packet Routing best-route Prefix-SID installation enabled. Detection requires checking OSPF configuration and monitoring for crashes or abnormal behavior in the routing protocol daemon (rpd).

Impact Analysis

This vulnerability allows an adjacent attacker to disrupt network operations by causing a denial of service. Affected systems may experience crashes or become unresponsive, leading to network downtime and potential loss of connectivity for users and services.

Compliance Impact

The vulnerability causes a denial of service via OSPF traffic, which could disrupt network availability. This may impact compliance with standards requiring network reliability and uptime, such as GDPR's security principle or HIPAA's availability requirements.

Mitigation Strategies

Disable OSPF Source Packet Routing best-route Prefix-SID installation on affected Juniper devices until patches are applied.

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