Is CVE-2026-103392 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-103392?

CVE-2026-103392 has a CVSS v3 severity of MEDIUM (4.8).

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CVE-2026-103392

Description

An Out-of-Bounds Write vulnerability in the TCP header processing in Juniper Networks Session Smart Router allows an attacker to corrupt TCP payload data and potentially cause session desynchronization via a transit TCP packet with an oversized SACK option length.