CVE-2018-0030: Junos OS: MPC7/8/9, PTX-FPC3 (FPC-P1, FPC-P2) and PTX1K: Line card may crash upon receipt of specific MPLS packet.

Security readout for executives and security teams

Certain Juniper routing platforms can crash and restart when they receive a specific MPLS packet. Repeated traffic could keep affected line cards or PTX1K devices unavailable, disrupting network service. The known impact is availability loss, not data theft or system takeover. Exposure is concentrated in organizations running affected Juniper MPLS-capable routing hardware and vulnerable Junos OS versions. Internet exposure is not established by the sources; practical exposure depends on where MPLS traffic can reach the affected interfaces or devices. Treat as high priority for networks using the affected Juniper platforms, especially service-provider or core routing environments. The risk is operational outage from repeat device crashes rather than compromise of confidentiality or integrity. Mitigation focus: Upgrade affected Junos OS deployments to fixed releases identified in Juniper JSA10864.; Use Juniper KB25385 to confirm whether installed PFE line cards match affected hardware.; Prioritize routers carrying critical MPLS or backbone traffic..

Prepared

May 24, 2026, 09:27 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.