---
id: CVE-2026-101990
title: >-
  A Stack-based Buffer Overflow vulnerability in the routing protocol daemon
  (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a remote
  configured BGP peer to cause an rpd crash, or on Junos OS remote
  code-execution, via sendi…
summary: >-
  A Stack-based Buffer Overflow vulnerability in the routing protocol daemon
  (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a remote
  configured BGP peer to cause an rpd crash, or on Junos OS remote
  code-execution, via sendi…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-121
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T17:17:51.587'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-101990'
references:
  - url: 'https://supportportal.juniper.net/JSA112187'
    label: sirt@juniper.net
tags:
  - nvd
ingestedAt: '2026-10-14T17:44:53.640Z'
---

## Overview

A Stack-based Buffer Overflow vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a remote configured BGP peer to cause an rpd crash, or on Junos OS remote code-execution, via sending a flow-spec update which is selected for re-advertisement.

## Remediation

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