CRITICALVulnerability
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NVD CRITICAL: CVE-2026-103409 — A Missing authentication for critical function vulnerability in Juniper Networks...

·Source: NIST NVD

Updated:

Executive Summary

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 expl

Analysis

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. CVSS Score: 9.8. Published: 2026-10-28T17:17:27.840.

Indicators of Compromise (1)

CVE (1)
CVE-2026-103409
NVDMITRE CVE
Source Attribution

Originally published by NIST NVD on Oct 28, 2026. Verified by: NIST.

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