What is CVE-2018-0016?

CVE-2018-0016 is a critical-severity vulnerability in Juniper Junos. CVSS score: 9.8/10. Published 2018-04-11.

How severe is CVE-2018-0016?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2018-0016 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Juniper Junos

CVE-2018-0016

Receipt of a specially crafted Connectionless Network Protocol (CLNP) datagram destined to an interface of a Junos OS device may result in a kernel crash or lead to remote code execution. Devices are only vulnerable to the specially crafted CLNP datagram if 'clns-routing' or ES-IS is explicitly configured. Devices with without CLNS enabled are not vulnerable to this issue. Devices with IS-IS configured on the interface are not vulnerable to this issue unless CLNS routing is also enabled. This issue only affects devices running Junos OS 15.1. Affected releases are Juniper Networks Junos OS: 15.1 versions prior to 15.1F5-S3, 15.1F6-S8, 15.1F7, 15.1R5; 15.1X49 versions prior to 15.1X49-D60; 15.1X53 versions prior to 15.1X53-D66, 15.1X53-D233, 15.1X53-D471. Earlier releases are unaffected by this vulnerability, and the issue has been resolved in Junos OS 16.1R1 and all subsequent releases.

Published 2018-04-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.041 (90.3th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 90.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.041 · newest: 0.041 · change: -0.001

Affected products

Juniper Junos — versions 15.1, 15.1f, 15.1f2
Juniper Networks Junos OS — versions 15.1X53, 15.1X49, 15.1

Public proof-of-concept exploits

CyberSecAI/KeyPhraseExtractionModel

References

www.securityfocus.com/bid/103747 (VDB Entry, Third Party Advisory, vdb-entry)
www.securitytracker.com/id/1040784 (VDB Entry, Third Party Advisory, vdb-entry)
kb.juniper.net/JSA10844 (Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2018-0016?: CVE-2018-0016 is a critical-severity vulnerability in Juniper Junos. CVSS score: 9.8/10. Published 2018-04-11.
How severe is CVE-2018-0016?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2018-0016 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.