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 a configured BGP EVPN peer to cause an rpd crash via a specifically malformed NLRI.
Published: 2026-10-14
Score: 8.7 High
EPSS: < 1% Very Low
KEV: No
Impact: Denial of Service via rpd crash
Action: Apply Patch
AI Analysis

Impact

The vulnerability is an improper validation of a specified quantity in input received by the routing protocol daemon. When a BGP EVPN session receives a malformed NLRI, the daemon crashes, causing a denial of service that disrupts routing functionality and may temporarily deny network connectivity to affected devices.

Affected Systems

Affected products are Juniper Networks Junos OS and Junos OS Evolved. The issue is present in a range of releases, including 23.2R2-S7.7 through 26.4R1 and all subsequent releases of Junos OS, and the corresponding Evo releases listed in the advisory. Any system running a version prior to those updates with the specified respins is also vulnerable.

Risk and Exploitability

The CVSS score is 8.7, classifying the issue as high severity. The EPSS score is < 1%, and the vulnerability is not listed in the CISA KEV catalog. Attackers would need the ability to send a specially crafted BGP EVPN NLRI to a peer; the crash occurs without privilege escalation, so the primary risk is service disruption to the victim device.

Generated by OpenCVE AI on October 15, 2026 at 15:10 UTC.

Remediation

Vendor Solution

The following software releases have been updated to resolve this specific issue: Junos OS: 23.2R2-S7.7, 23.4R2-S8.13, 24.2R2-S5.5, 24.4R2-S5, 25.2R2-S2, 25.4R1-S3, 25.4R2, 26.2R1-S2, 26.2R2, 26.4R1, and all subsequent releases. Junos OS Evolved: 23.2R2-S7.7-EVO, 23.4R2-S8.11-EVO, 24.2R2-S5.6-EVO, 24.4R2-S5-EVO, 25.2R2-S2-EVO, 25.2X100-D35-EVO, 25.4R1-S3-EVO, 25.4R2-EVO, 25.4X300-D40-EVO, 26.2R1-S2-EVO, 26.2R2-EVO, 26.4R1-EVO, and all subsequent releases. Note: For Junos OS releases 23.2, 23.4, and 24.2, and Junos OS Evolved releases 23.2-EVO, 23.4-EVO, and 24.2-EVO, specific respins have been referenced. Previously published versions of these releases have been rebuilt to resolve the security vulnerabilities identified in this advisory.

Vendor Workaround

There are no known workarounds for this issue.

OpenCVE Recommended Actions

  • Apply all Juniper patches listed for Junos OS and Junos OS Evolved to bring devices to an updated release.
  • Verify that no legacy respins of the impacted releases remain in use; if present, upgrade to the full‑patched versions.
  • Temporarily restrict or disable BGP EVPN peers that are not essential until devices are patched to prevent exposure to malformed NLRI traffic.

Generated by OpenCVE AI on October 15, 2026 at 15:10 UTC.

Tracking

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Advisories

No advisories yet.

History

Sat, 17 Oct 2026 01:00:00 +0000

Type Values Removed Values Added
First Time appeared Juniper Networks
Juniper Networks junos Os
Juniper Networks junos Os Evolved
Vendors & Products Juniper Networks
Juniper Networks junos Os
Juniper Networks junos Os Evolved

Wed, 14 Oct 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 14 Oct 2026 17:15:00 +0000

Type Values Removed Values Added
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 a configured BGP EVPN peer to cause an rpd crash via a specifically malformed NLRI.
Title Junos OS and Junos OS Evolved: If in a BGP EVPN scenario a malformed NLRI is received rpd crashes
Weaknesses CWE-1284
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/AU:Y/R:A/V:C/RE:M'}

Subscriptions

Juniper Networks Junos Os Junos Os Evolved
cve-icon MITRE

Status: PUBLISHED

Assigner: juniper

Published:

Updated: 2026-10-14T19:05:07.015Z

Reserved: 2026-09-28T18:17:13.470Z

Link: CVE-2026-102183

cve-icon Vulnrichment

Updated: 2026-10-14T19:04:21.941Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-14T17:18:06.220

Modified: 2026-10-15T16:23:06.250

Link: CVE-2026-102183

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-17T00:45:13Z

Weaknesses
  • CWE-1284

    Improper Validation of Specified Quantity in Input