CVE-2026-102057

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Stack-based Buffer Overflow in Juniper Networks Junos OS jdhcpd

Publication date: 2026-10-14

Last updated on: 2026-10-14

Assigner: Juniper Networks, Inc.

Description

A Stack-based Buffer Overflow vulnerability in the jdhcpd process of Juniper Networks Junos OS allows an unauthenticated adjacent attacker to cause a denial of service via a DHCP client response. The issue affects DHCP client operation and can interrupt related DHCP, relay, and zero-touch-provisioning services.

CVSS 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-2026-102057

EUVD

EUVD-2026-101382

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

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-121	A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

Attack-Flow Graph

Executive Summary

This vulnerability is a stack-based buffer overflow in the jdhcpd process of Juniper Networks Junos OS. An unauthenticated attacker on the same network can exploit it by sending a malicious DHCP client response, causing a denial of service. This disrupts DHCP operations and related services like DHCP relay and zero-touch-provisioning.

Detection Guidance

Detecting this vulnerability requires monitoring the jdhcpd process for crashes or abnormal behavior. Check system logs for DHCP-related errors or service interruptions. Use commands like 'show system processes extensive | match jdhcpd' to monitor the process and 'show log messages | match jdhcpd' to review logs for crashes.

Impact Analysis

The vulnerability can cause service disruptions by crashing the jdhcpd process, leading to downtime for DHCP, relay, and zero-touch-provisioning services. This may result in network connectivity issues for devices relying on DHCP for IP address assignment.

Compliance Impact

This vulnerability could impact compliance with GDPR and HIPAA by disrupting DHCP services, which may lead to network downtime or unauthorized access. Downtime could affect data processing systems, potentially violating availability requirements under GDPR Article 32 or HIPAA Security Rule standards for reliable access to protected health information.

Mitigation Strategies

Apply the latest Junos OS security patch from Juniper Networks to address the jdhcpd buffer overflow vulnerability. Disable DHCP client services if not required and monitor for unusual DHCP client responses.

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