CVE-2026-101967

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OS Command Injection in Juniper Junos OS Evolved

Publication date: 2026-10-14

Last updated on: 2026-10-15

Assigner: Juniper Networks, Inc.

Description

An OS Command Injection vulnerability in the bootzd zero-touch provisioning daemon of Juniper Networks Junos OS Evolved allows an unauthenticated attacker on the management LAN to execute commands as root via crafted DHCP response.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-10-14

Last Modified

2026-10-15

Generated

2026-10-19

AI Q&A

2026-10-15

EPSS Evaluated

2026-10-18

NVD

CVE-2026-101967

EUVD

EUVD-2026-101430

Affected Vendors & Products

Vendor	Product	Version / Range
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-78	The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

Attack-Flow Graph

Executive Summary

This is an OS Command Injection vulnerability in Juniper Networks Junos OS Evolved. It exists in the zero-touch provisioning daemon called bootzd. An unauthenticated attacker on the management LAN can exploit crafted DHCP responses to execute commands as the root user.

Detection Guidance

Detection requires monitoring DHCP responses on the management LAN for crafted packets targeting the bootzd daemon. Inspect DHCP server logs for malformed options or unexpected payloads. Check Junos OS Evolved logs for bootzd-related anomalies or root command execution attempts.

Impact Analysis

An attacker could gain full control over the affected system by executing arbitrary commands with root privileges. This could lead to complete compromise of the device, data theft, unauthorized access, or disruption of services.

Compliance Impact

This vulnerability allows unauthenticated attackers to execute arbitrary commands as root via crafted DHCP responses, potentially leading to full system compromise. Such unauthorized access could result in unauthorized data access, modification, or exfiltration, which may violate GDPR (data protection) and HIPAA (healthcare data privacy) requirements for access controls and data integrity.

Mitigation Strategies

Apply the latest security patches from Juniper Networks to address the OS Command Injection vulnerability in the bootzd zero-touch provisioning daemon. Isolate affected systems on the management LAN to limit exposure. Monitor network traffic for unusual DHCP responses or unauthorized command execution attempts.

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