What is CVE-2019-0033?

CVE-2019-0033 is a high-severity vulnerability in Juniper Junos, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2019-04-10.

How severe is CVE-2019-0033?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Juniper Junos

CVE-2019-0033

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.

Vulnerability class: DoS (Denial of Service)

Published 2019-04-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.016 (74.4th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 74.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

kb.juniper.net/JSA10922 (Mitigation, Vendor Advisory)
www.securityfocus.com/bid/107882 (vdb-entry)

Frequently asked questions

What is CVE-2019-0033?: CVE-2019-0033 is a high-severity vulnerability in Juniper Junos, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2019-04-10.
How severe is CVE-2019-0033?: High severity. CVSS v3 base score is 7.5 out of 10.