What is CVE-2018-0053?

CVE-2018-0053 is a medium-severity vulnerability in Juniper Junos, classified under Improper Authentication. CVSS score: 6.8/10. Published 2018-10-10.

How severe is CVE-2018-0053?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Auth bypass in Juniper Junos

CVE-2018-0053

An authentication bypass vulnerability in the initial boot sequence of Juniper Networks Junos OS on vSRX Series may allow an attacker to gain full control of the system without authentication when the system is initially booted up. Affected releases are Juniper Networks Junos OS: 15.1X49 versions prior to 15.1X49-D30 on vSRX.

Vulnerability class: Broken Authentication

Published 2018-10-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (40.0th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 40.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Juniper Junos — versions 15.1x49
Juniper Vsrx
Juniper Networks Junos OS — versions 15.1X49

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

kb.juniper.net/JSA10887 (Vendor Advisory)
www.securitytracker.com/id/1041854 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2018-0053?: CVE-2018-0053 is a medium-severity vulnerability in Juniper Junos, classified under Improper Authentication. CVSS score: 6.8/10. Published 2018-10-10.
How severe is CVE-2018-0053?: Medium severity. CVSS v3 base score is 6.8 out of 10.