Improper Authentication Vulnerability in Junos OS by Juniper Networks
CVE-2026-101954

9.3CRITICAL

Key Information:

Vendor

Juniper Networks
Status
Junos Os
Junos Os Evolved
Vendor
CVE Published:
14 October 2026

Badges

👾 Exploit Exists

What is CVE-2026-101954?

An improper authentication vulnerability within the J-Web management interface and its NETCONF session handling in Junos OS allows unauthorized network attackers to access sensitive root-level device configurations. This vulnerability can be exploited when the J-Web HTTP or HTTPS service is enabled, potentially leading to full device takeover by exploiting the management interface.

Affected Version(s)

Junos OS 25.2 < 25.2R2-S2

Junos OS 25.4 < 25.4R1-S3

Junos OS 26.2 < 26.2R1-S2

References

https://supportportal.juniper.net/JSA112187
vendor-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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