---
id: CVE-2026-103993
title: >-
  An Out-of-bounds Write vulnerability in the routing protocol daemon (rpd) of
  Juniper Networks Junos OS and Junos OS Evolved allows an adjacent attacker
  which sends a specific set of BGP communities to cause a Denial-of-Service
  (DoS) as r…
summary: >-
  An Out-of-bounds Write vulnerability in the routing protocol daemon (rpd) of
  Juniper Networks Junos OS and Junos OS Evolved allows an adjacent attacker
  which sends a specific set of BGP communities to cause a Denial-of-Service
  (DoS) as r…
severity: medium
cvss: 6.8
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H'
cwe:
  - CWE-787
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T21:17:34.150'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-103993'
references:
  - url: 'https://supportportal.juniper.net/JSA112187'
    label: sirt@juniper.net
tags:
  - nvd
ingestedAt: '2026-10-14T17:44:53.672Z'
---

## Overview

An Out-of-bounds Write vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent attacker which sends a specific set of BGP communities to cause a Denial-of-Service (DoS) as rpd crashes when graceful-shutdown sender community is added when attempting to advertise.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.