Is CVE-2026-103393 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-103393?

CVE-2026-103393 has a CVSS v3 severity of MEDIUM (4.3).

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CVE-2026-103393

Description

An Out-of-Bounds Read vulnerability in the VRRP implementation in Juniper Networks Session Smart Router allows an L2-adjacent attacker to read stale memory contents or cause a system fault via a specially crafted VRRPv3 advertisement.