Is CVE-2026-103400 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-103400?

CVE-2026-103400 has a CVSS v3 severity of MEDIUM (5.5).

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CVE-2026-103400

Description

An Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') vulnerability in the ember service in Juniper Networks Session Smart Router and Session Smart Conductor allows an attacker with local access to unmount arbitrary filesystems or cause a denial of service via the creation of specially named directories and a service restart.