CVE-2019-0033: Juniper Junos

High severity, CVSS 7.5. EPSS: 1.6% chance of exploitation in the next 30 days.

A firewall bypass vulnerability in the proxy ARP service of Juniper Networks Junos OS allows an attacker to cause a high CPU condition leading to a Denial of Service (DoS). This issue affects only IPv4. Affected releases are Juniper Networks Junos OS: 12.1X46 versions above and including 12.1X46-D25 prior to 12.1X46-D71, 12.1X46-D73 on SRX Series; 12.3X48 versions prior to 12.3X48-D50 on SRX Series; 15.1X49 versions prior to 15.1X49-D75 on SRX Series.

Affected products

• Juniper Junos: from 12.1x46, up to and including 12.1x46-d10; from 12.1x46-d25, before 12.1x46-d71 (fixed in 12.1x46-d71); from 12.3x48, before 12.3x48-d50 (fixed in 12.3x48-d50); from 15.1x49, before 15.1x49-d75 (fixed in 15.1x49-d75)

Published 2019-04-10. Last modified 2026-06-17.