CVE-2014-3814: Juniper Netscreen-5200

High severity, CVSS 7.8. EPSS: 1.3% chance of exploitation in the next 30 days.

The Juniper Networks NetScreen Firewall devices with ScreenOS before 6.3r17, when configured to use the internal DNS lookup client, allows remote attackers to cause a denial of service (crash and reboot) via a sequence of malformed packets to the device IP.

Affected products

• Juniper Netscreen-5200
• Juniper Netscreen-5400
• Juniper ScreenOS: up to and including 6.3.0; version 6.0.0 only; version 6.1.0 only; version 6.2.0 only

Published 2014-06-13. Last modified 2026-06-17.