Skip to content
OpenAdvisories
Critical · 9.8 CVE-2026-101954 EUVD-2026-101494GHSA-34c5-5qc5-99pf

Junos OS and Junos OS Evolved: Unauthenticated network access causes full device takeover when J-Web is enabled

Published Oct 14, 2026 · Updated Oct 16, 2026 · Assigned by juniper

Description

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.

Affected products

VendorProductAffectedFixed
Juniper Networks Junos OS 25.2 – < 25.2R2-S2, 25.4 – < 25.4R1-S3, 26.2 – < 26.2R1-S2 25.2R2-S2
Juniper Networks Junos OS Evolved 25.2 – < 25.2R2-S2-EVO, 25.4 – < 25.4R1-S3-EVO, 26.2 – < 26.2R1-S2-EVO, 23.4X100, 25.2X100 – < 25.2X100-D35-EVO, 25.4X300 – < 25.4X300-D40-EVO 25.2R2-S2-EVO

References