CVE-2019-0009: Juniper Junos

Medium severity, CVSS 5.5. EPSS: 0.4% chance of exploitation in the next 30 days.

On EX2300 and EX3400 series, high disk I/O operations may disrupt the communication between the routing engine (RE) and the packet forwarding engine (PFE). In a virtual chassis (VC) deployment, this issue disrupts communication between the VC members. This issue does not affect other Junos platforms. Affected releases are Junos OS on EX2300 and EX3400 series: 15.1X53 versions prior to 15.1X53-D590; 18.1 versions prior to 18.1R2-S2, 18.1R3; 18.2 versions prior to 18.2R2.

Affected products

• Juniper Junos: version 15.1x53 only; version 18.1 only; version 18.2 only

Published 2019-01-15. Last modified 2026-06-17.