CVE-2026-102017
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Out-of-Bounds Write in Juniper Junos OS and Junos OS Evolved

Publication date: 2026-10-14

Last updated on: 2026-10-14

Assigner: Juniper Networks, Inc.

Description
An Out-of-bounds Write vulnerability in the rpd process of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated attacker to cause a routing-plane denial of service via Auto-RP mapping announcements received when Auto-RP mapping is enabled.

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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-2026-102017
EUVD
EUVD-2026-101338

Affected Vendors & Products

Showing 17 associated CPEs
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

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.

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Executive Summary

This vulnerability is an Out-of-bounds Write flaw in Juniper Networks Junos OS and Junos OS Evolved. It occurs in the rpd process and can be triggered by an unauthenticated attacker sending Auto-RP mapping announcements when Auto-RP mapping is enabled. This causes a denial of service on the routing plane.

Detection Guidance

This vulnerability can be detected by checking if Auto-RP mapping is enabled on Juniper devices running Junos OS or Junos OS Evolved. Monitor for crashes or instability in the rpd process. Juniper recommends disabling Auto-RP mapping if not required. Use 'show configuration protocols pim' to verify Auto-RP settings.

Impact Analysis

The impact includes potential disruption of network routing services, leading to loss of connectivity or network instability. Since it affects the routing plane, it could impact all network traffic dependent on the affected Juniper devices.

Compliance Impact

The vulnerability causes a routing-plane denial of service via Auto-RP mapping announcements, which could disrupt network availability. This may impact compliance with standards requiring continuous availability, such as GDPR (data processing integrity) or HIPAA (system availability for protected health information).

Mitigation Strategies

Disable Auto-RP mapping if not required. Update Junos OS or Junos OS Evolved to the latest patched version. Monitor routing-plane stability and apply Juniper's security advisories for patches.

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