CVE-2026-103409

CriticalCVSS 9.8/10Last modified Nov 6, 2026

Description

A Missing authentication for critical function vulnerability in Juniper Networks Session Smart Router allows an unauthenticated network-based attacker to obtain administrative privileges by passing crafted URL parameters to an insecure endpoint running as root.

Note that this vulnerability can only be exploited prior to the device being onboarded to Mist/Conductor. The issue can no longer be exploited once a device is onboarded to Mist/Conductor.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-306

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

Vendor	Product	Versions
Juniper Networks	Session Smart Router	< 7.0.5; >= 7.1.0, < 7.1.7; >= 7.2.0, < 7.2.3

References

https://supportportal.juniper.net/JSA112183

Timeline

Published: Oct 28, 2026
Last modified: Nov 6, 2026
NVD status: Awaiting Analysis

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