CVE-2026-102067

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Improper Input Validation in Juniper Junos OS RPD

Publication date: 2026-10-14

Last updated on: 2026-10-14

Assigner: Juniper Networks, Inc.

Description

An Improper Validation of Specified Quantity in Input vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent unauthenticated attacker to cause a denial of service via a crafted RSVP packet when L2 LSP support is enabled.

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-2026-102067

EUVD

EUVD-2026-101445

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-1284	The product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties.

Attack-Flow Graph

Executive Summary

This vulnerability is an Improper Validation of Specified Quantity in Input issue in Juniper Networks Junos OS and Junos OS Evolved. It exists in the routing protocol daemon (rpd) and can be exploited by an adjacent unauthenticated attacker sending a crafted RSVP packet when L2 LSP support is enabled. This causes a denial of service.

Detection Guidance

Detection requires monitoring for crafted RSVP packets when L2 LSP support is enabled. Juniper recommends checking for unusual traffic patterns or crashes in the routing protocol daemon (rpd). Use 'show system processes extensive | match rpd' to verify rpd status and 'show log messages | match RSVP' to inspect RSVP-related logs for anomalies.

Impact Analysis

An attacker could exploit this to disrupt network services by causing a denial of service. This may lead to network outages, degraded performance, or loss of connectivity for affected systems running vulnerable Junos OS or Junos OS Evolved versions.

Compliance Impact

The vulnerability causes a denial of service via crafted RSVP packets, which could disrupt network services. This may impact compliance with standards requiring availability of critical systems, such as GDPR's data processing requirements or HIPAA's access controls, by potentially leading to service unavailability.

Mitigation Strategies

Disable L2 LSP support on affected Juniper devices running Junos OS or Junos OS Evolved to prevent exploitation via crafted RSVP packets.

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