---
id: CVE-2026-101986
title: >-
  An  Improper Authentication vulnerability in J-Web of Juniper Networks Junos
  OS and Junos OS Evolved allows an unauthenticated network attacker to bypass
  J-Web authentication and execute CGI content with elevated privileges via a
  crafted…
summary: >-
  An  Improper Authentication vulnerability in J-Web of Juniper Networks Junos
  OS and Junos OS Evolved allows an unauthenticated network attacker to bypass
  J-Web authentication and execute CGI content with elevated privileges via a
  crafted…
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-287
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T21:17:25.527'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-101986'
references:
  - url: 'https://supportportal.juniper.net/JSA112187'
    label: sirt@juniper.net
tags:
  - nvd
ingestedAt: '2026-10-14T17:44:53.638Z'
---

## Overview

An  Improper Authentication vulnerability in J-Web of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated network attacker to bypass J-Web authentication and execute CGI content with elevated privileges via a crafted HTTP request.

## Remediation

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