Auth bypass in Juniper Networks Junos OS

CVE-2026-101954

An Improper Authentication vulnerability in the J-Web management interface and its NETCONF session handling of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated network attacker to obtain root-level device configuration access and take over the device via a reachable J-Web HTTP or HTTPS service when web management is enabled.

Vulnerability class: Broken Authentication

Published .

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-101954?
CVE-2026-101954 is a critical-severity vulnerability in Juniper Networks Junos OS, classified under Improper Authentication. CVSS score: 9.8/10. Published 2026-10-14.
How severe is CVE-2026-101954?
Critical severity. CVSS v3 base score is 9.8 out of 10.