---
title: "CVE-2026-101956: Juniper Networks Junos OS - Authentication Bypass"
description: "Juniper Networks Junos OS contains an improper authentication vulnerability in the J-Web web management component, letting unauthenticated remote attackers execute arbitrary Junos commands with root privileges via the exposed web interface."
url: https://panop.io/threat-heartbeat/CVE-2026-101956/
---

# CVE-2026-101956 Juniper Networks Junos OS - Authentication Bypass

Juniper Networks Junos OS contains an improper authentication vulnerability in the J-Web web management component, letting unauthenticated remote attackers execute arbitrary Junos commands with root privileges via the exposed web interface.

CVSS base score 9.8 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-101956)

## Details

Type

Authentication Bypass

Impact

Remote Code Execution, Privilege Escalation

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Published

14 October 2026

Updated

15 October 2026

Weakness

[CWE-287](https://cwe.mitre.org/data/definitions/287.html)

## Vendor fix

Update to the latest version of Junos OS that patches this vulnerability.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-101956](https://nvd.nist.gov/vuln/detail/CVE-2026-101956)
- [https://supportportal.juniper.net/JSA112188](https://supportportal.juniper.net/JSA112188)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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