---
id: CVE-2026-101983
title: >-
  A Stack-based Buffer Overflow vulnerability in the httpd process of Juniper
  Networks Junos OS and Junos OS Evolved allows an unauthenticated network
  attacker to cause remote code execution and denial of service via a J-Web
  virtual-domain…
summary: >-
  A Stack-based Buffer Overflow vulnerability in the httpd process of Juniper
  Networks Junos OS and Junos OS Evolved allows an unauthenticated network
  attacker to cause remote code execution and denial of service via a J-Web
  virtual-domain…
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
vendor: Juniper Networks
product: Junos OS
affected:
  - junos_os >= 23.4 < 23.4R2-S8.13
  - junos_os >= 24.2 < 24.2R2-S5.5
  - junos_os >= 24.4 < 24.4R2-S5
  - junos_os >= 25.2 < 25.2R2-S2
  - junos_os >= 25.4 < 25.4R1-S3
  - junos_os >= 26.2 < 26.2R1-S2
  - junos_os_evolved >= 23.4 < 23.4R2-S8.11-EVO
  - junos_os_evolved >= 24.2 < 24.2R2-S5.6-EVO
  - junos_os_evolved >= 24.4 < 24.4R2-S5-EVO
  - junos_os_evolved >= 25.2 < 25.2R2-S2-EVO
  - junos_os_evolved >= 25.4 < 25.4R1-S3-EVO
  - junos_os_evolved >= 26.2 < 26.2R1-S2-EVO
  - junos_os_evolved 23.4X100
  - junos_os_evolved >= 25.2X100 < 25.2X100-D35-EVO
  - junos_os_evolved >= 25.4X300 < 25.4X300-D40-EVO
published: '2026-10-14'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T16:24:19.073'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-101983'
references:
  - url: 'https://supportportal.juniper.net/JSA112187'
    label: sirt@juniper.net
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-10-14T19:47:17.878613Z'
ingestedAt: '2026-10-14T18:47:39.305Z'
epss: 0.0054
epssPercentile: 0.4523
---

## Overview

A Stack-based Buffer Overflow vulnerability in the httpd process of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated network attacker to cause remote code execution and denial of service via a J-Web virtual-domain configured.

## Remediation

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