Vulnerability Database

346,508

Total vulnerabilities in the database

CVE-2020-1618 — juniper / junos

Improper Authentication

On Juniper Networks EX and QFX Series, an authentication bypass vulnerability may allow a user connected to the console port to login as root without any password. This issue might only occur in certain scenarios: • At the first reboot after performing device factory reset using the command “request system zeroize”; or • A temporary moment during the first reboot after the software upgrade when the device configured in Virtual Chassis mode. This issue affects Juniper Networks Junos OS on EX and QFX Series: 14.1X53 versions prior to 14.1X53-D53; 15.1 versions prior to 15.1R7-S4; 15.1X53 versions prior to 15.1X53-D593; 16.1 versions prior to 16.1R7-S4; 17.1 versions prior to 17.1R2-S11, 17.1R3-S1; 17.2 versions prior to 17.2R3-S3; 17.3 versions prior to 17.3R2-S5, 17.3R3-S6; 17.4 versions prior to 17.4R2-S9, 17.4R3; 18.1 versions prior to 18.1R3-S8; 18.2 versions prior to 18.2R2; 18.3 versions prior to 18.3R1-S7, 18.3R2. This issue does not affect Juniper Networks Junos OS 12.3.

  • Published: Apr 8, 2020
  • Updated: Nov 9, 2025
  • CVE: CVE-2020-1618
  • Severity: Medium
  • Exploit:

CVSS v3:

  • Severity: Medium
  • Score: 6.3
  • AV:P/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v2:

  • Severity: Medium
  • Score: 6.9
  • AV:L/AC:M/Au:N/C:C/I:C/A:C
Software From Fixed in
juniper / junos 14.1x53-d15 14.1x53-d15.x
juniper / junos 14.1x53-d45 14.1x53-d45.x
juniper / junos 14.1x53-d35 14.1x53-d35.x
juniper / junos 14.1x53-d10 14.1x53-d10.x
juniper / junos 14.1x53-d30 14.1x53-d30.x
juniper / junos 14.1x53-d42 14.1x53-d42.x
juniper / junos 14.1x53-d40 14.1x53-d40.x
juniper / junos 14.1x53-d25 14.1x53-d25.x
juniper / junos 14.1x53-d27 14.1x53-d27.x
juniper / junos 14.1x53-d16 14.1x53-d16.x
juniper / junos 14.1x53-d43 14.1x53-d43.x
juniper / junos 14.1x53-d44 14.1x53-d44.x
juniper / junos 14.1x53-d26 14.1x53-d26.x
juniper / junos 14.1x53-d50 14.1x53-d50.x
juniper / junos 14.1x53-d48 14.1x53-d48.x
juniper / junos 14.1x53 14.1x53.x
juniper / junos 14.1x53-d51 14.1x53-d51.x
juniper / junos 14.1x53-d52 14.1x53-d52.x
juniper / junos 15.1-f6-s12 15.1-f6-s12.x
juniper / junos 15.1 15.1.x
juniper / junos 15.1-f6-s2 15.1-f6-s2.x
juniper / junos 15.1-f6-s1 15.1-f6-s1.x
juniper / junos 15.1-r7-s2 15.1-r7-s2.x
juniper / junos 15.1-r7-s3 15.1-r7-s3.x
juniper / junos 15.1-r7-s1 15.1-r7-s1.x
juniper / junos 15.1-r5-s6 15.1-r5-s6.x
juniper / junos 15.1-r6-s2 15.1-r6-s2.x
juniper / junos 15.1-f 15.1-f.x
juniper / junos 15.1-f6-s3 15.1-f6-s3.x
juniper / junos 15.1-r4-s9 15.1-r4-s9.x
juniper / junos 15.1-r6-s6 15.1-r6-s6.x
juniper / junos 15.1-f5 15.1-f5.x
juniper / junos 15.1-r5-s5 15.1-r5-s5.x
juniper / junos 15.1-r1 15.1-r1.x
juniper / junos 15.1-f2-s1 15.1-f2-s1.x
juniper / junos 15.1-r5-s1 15.1-r5-s1.x
juniper / junos 15.1-r5 15.1-r5.x
juniper / junos 15.1-r6-s1 15.1-r6-s1.x
juniper / junos 15.1-r4-s7 15.1-r4-s7.x
juniper / junos 15.1-r4-s8 15.1-r4-s8.x
juniper / junos 15.1-f6-s4 15.1-f6-s4.x
juniper / junos 15.1-f3 15.1-f3.x
juniper / junos 15.1-r2 15.1-r2.x
juniper / junos 15.1-a1 15.1-a1.x
juniper / junos 15.1-f5-s7 15.1-f5-s7.x
juniper / junos 15.1-f6-s7 15.1-f6-s7.x
juniper / junos 15.1-f6 15.1-f6.x
juniper / junos 15.1-f2 15.1-f2.x
juniper / junos 15.1-r3 15.1-r3.x
juniper / junos 15.1-f2-s4 15.1-f2-s4.x
juniper / junos 15.1-r6 15.1-r6.x
juniper / junos 15.1-f4 15.1-f4.x
juniper / junos 15.1-r4 15.1-r4.x
juniper / junos 15.1-f2-s2 15.1-f2-s2.x
juniper / junos 15.1-f2-s3 15.1-f2-s3.x
juniper / junos 15.1-f7 15.1-f7.x
juniper / junos 15.1-r7 15.1-r7.x
juniper / junos 15.1-f1 15.1-f1.x
juniper / junos 15.1x53-d47 15.1x53-d47.x
juniper / junos 15.1x53-d10 15.1x53-d10.x
juniper / junos 15.1x53-d62 15.1x53-d62.x
juniper / junos 15.1x53-d30 15.1x53-d30.x
juniper / junos 15.1x53-d40 15.1x53-d40.x
juniper / junos 15.1x53-d33 15.1x53-d33.x
juniper / junos 15.1x53-d25 15.1x53-d25.x
juniper / junos 15.1x53-d20 15.1x53-d20.x
juniper / junos 15.1x53-d63 15.1x53-d63.x
juniper / junos 15.1x53-d32 15.1x53-d32.x
juniper / junos 15.1x53-d57 15.1x53-d57.x
juniper / junos 15.1x53-d34 15.1x53-d34.x
juniper / junos 15.1x53-d64 15.1x53-d64.x
juniper / junos 15.1x53-d210 15.1x53-d210.x
juniper / junos 15.1x53-d70 15.1x53-d70.x
juniper / junos 15.1x53-d60 15.1x53-d60.x
juniper / junos 15.1x53-d21 15.1x53-d21.x
juniper / junos 15.1x53-d48 15.1x53-d48.x
juniper / junos 15.1x53-d45 15.1x53-d45.x
juniper / junos 15.1x53-d230 15.1x53-d230.x
juniper / junos 15.1x53-d61 15.1x53-d61.x
juniper / junos 15.1x53-d56 15.1x53-d56.x
juniper / junos 15.1x53-d50 15.1x53-d50.x
juniper / junos 15.1x53-d51 15.1x53-d51.x
juniper / junos 15.1x53-d52 15.1x53-d52.x
juniper / junos 15.1x53-d55 15.1x53-d55.x
juniper / junos 15.1x53-d65 15.1x53-d65.x
juniper / junos 15.1x53-d231 15.1x53-d231.x
juniper / junos 15.1x53-d470 15.1x53-d470.x
juniper / junos 15.1x53-d58 15.1x53-d58.x
juniper / junos 15.1x53-d66 15.1x53-d66.x
juniper / junos 15.1x53-d232 15.1x53-d232.x
juniper / junos 15.1x53-d233 15.1x53-d233.x
juniper / junos 15.1x53-d59 15.1x53-d59.x
juniper / junos 15.1x53-d67 15.1x53-d67.x
juniper / junos 15.1x53-d31 15.1x53-d31.x
juniper / junos 15.1x53-d495 15.1x53-d495.x
juniper / junos 15.1x53-d234 15.1x53-d234.x
juniper / junos 15.1x53-d590 15.1x53-d590.x
juniper / junos 15.1x53-d68 15.1x53-d68.x
juniper / junos 15.1x53-d237 15.1x53-d237.x
juniper / junos 15.1x53-d236 15.1x53-d236.x
juniper / junos 15.1x53-d235 15.1x53-d235.x
juniper / junos 15.1x53 15.1x53.x
juniper / junos 15.1x53-d591 15.1x53-d591.x
juniper / junos 15.1x53-d69 15.1x53-d69.x
juniper / junos 15.1x53-d592 15.1x53-d592.x
juniper / junos 16.1-r7-s2 16.1-r7-s2.x
juniper / junos 16.1-r7-s3 16.1-r7-s3.x
juniper / junos 16.1-r4-s12 16.1-r4-s12.x
juniper / junos 16.1-r4-s6 16.1-r4-s6.x
juniper / junos 16.1-r4-s2 16.1-r4-s2.x
juniper / junos 16.1-r3-s11 16.1-r3-s11.x
juniper / junos 16.1 16.1.x
juniper / junos 16.1-r6-s6 16.1-r6-s6.x
juniper / junos 16.1-r3-s10 16.1-r3-s10.x
juniper / junos 16.1-r5-s4 16.1-r5-s4.x
juniper / junos 16.1-r6-s1 16.1-r6-s1.x
juniper / junos 16.1-r7 16.1-r7.x
juniper / junos 16.1-r5 16.1-r5.x
juniper / junos 16.1-r2 16.1-r2.x
juniper / junos 16.1-r3 16.1-r3.x
juniper / junos 16.1-r4-s4 16.1-r4-s4.x
juniper / junos 16.1-r4-s3 16.1-r4-s3.x
juniper / junos 16.1-r4 16.1-r4.x
juniper / junos 16.1-r1 16.1-r1.x
juniper / junos 17.1-r3 17.1-r3.x
juniper / junos 17.1-r1 17.1-r1.x
juniper / junos 17.1-r2 17.1-r2.x
juniper / junos 17.1-r2-s7 17.1-r2-s7.x
juniper / junos 17.1 17.1.x
juniper / junos 17.1-r2-s1 17.1-r2-s1.x
juniper / junos 17.1-r2-s2 17.1-r2-s2.x
juniper / junos 17.1-r2-s3 17.1-r2-s3.x
juniper / junos 17.1-r2-s4 17.1-r2-s4.x
juniper / junos 17.1-r2-s5 17.1-r2-s5.x
juniper / junos 17.1-r2-s6 17.1-r2-s6.x
juniper / junos 17.1-r2-s10 17.1-r2-s10.x
juniper / junos 17.1-r2-s9 17.1-r2-s9.x
juniper / junos 17.1-r2-s8 17.1-r2-s8.x
juniper / junos 17.2-r3-s2 17.2-r3-s2.x
juniper / junos 17.2-r2-s7 17.2-r2-s7.x
juniper / junos 17.2-r3-s1 17.2-r3-s1.x
juniper / junos 17.2-r1-s8 17.2-r1-s8.x
juniper / junos 17.2-r1-s4 17.2-r1-s4.x
juniper / junos 17.2-r1-s1 17.2-r1-s1.x
juniper / junos 17.2-r1-s3 17.2-r1-s3.x
juniper / junos 17.2-r1-s5 17.2-r1-s5.x
juniper / junos 17.2 17.2.x
juniper / junos 17.2-r1-s7 17.2-r1-s7.x
juniper / junos 17.2-r2-s6 17.2-r2-s6.x
juniper / junos 17.2-r1-s2 17.2-r1-s2.x
juniper / junos 17.2-r2 17.2-r2.x
juniper / junos 17.2-r1 17.2-r1.x
juniper / junos 17.3-r2-s2 17.3-r2-s2.x
juniper / junos 17.3-r2 17.3-r2.x
juniper / junos 17.3 17.3.x
juniper / junos 17.3-r2-s1 17.3-r2-s1.x
juniper / junos 17.3-r3-s1 17.3-r3-s1.x
juniper / junos 17.3-r3-s2 17.3-r3-s2.x
juniper / junos 17.3-r3-s4 17.3-r3-s4.x
juniper / junos 17.3-r3-s5 17.3-r3-s5.x
juniper / junos 17.3-r3 17.3-r3.x
juniper / junos 17.3-r3-s3 17.3-r3-s3.x
juniper / junos 17.3-r2-s3 17.3-r2-s3.x
juniper / junos 17.3-r1-s1 17.3-r1-s1.x
juniper / junos 17.3-r2-s4 17.3-r2-s4.x
juniper / junos 17.4-r2-s8 17.4-r2-s8.x
juniper / junos 17.4-r2-s5 17.4-r2-s5.x
juniper / junos 17.4-r2-s6 17.4-r2-s6.x
juniper / junos 17.4-r2-s7 17.4-r2-s7.x
juniper / junos 17.4-r1-s5 17.4-r1-s5.x
juniper / junos 17.4-r1-s7 17.4-r1-s7.x
juniper / junos 17.4-r1-s4 17.4-r1-s4.x
juniper / junos 17.4-r2-s3 17.4-r2-s3.x
juniper / junos 17.4-r2-s4 17.4-r2-s4.x
juniper / junos 17.4-r1-s6 17.4-r1-s6.x
juniper / junos 17.4-r2-s1 17.4-r2-s1.x
juniper / junos 17.4-r1-s2 17.4-r1-s2.x
juniper / junos 17.4-r1-s1 17.4-r1-s1.x
juniper / junos 17.4-r2-s2 17.4-r2-s2.x
juniper / junos 17.4 17.4.x
juniper / junos 17.4-r1 17.4-r1.x
juniper / junos 17.4-r2 17.4-r2.x
juniper / junos 18.1-r3 18.1-r3.x
juniper / junos 18.1-r2 18.1-r2.x
juniper / junos 18.1-r3-s4 18.1-r3-s4.x
juniper / junos 18.1-r3-s3 18.1-r3-s3.x
juniper / junos 18.1-r3-s2 18.1-r3-s2.x
juniper / junos 18.1 18.1.x
juniper / junos 18.1-r2-s1 18.1-r2-s1.x
juniper / junos 18.1-r2-s4 18.1-r2-s4.x
juniper / junos 18.1-r2-s2 18.1-r2-s2.x
juniper / junos 18.1-r3-s1 18.1-r3-s1.x
juniper / junos 18.1-r3-s6 18.1-r3-s6.x
juniper / junos 18.1-r3-s7 18.1-r3-s7.x
juniper / junos 18.2 18.2.x
juniper / junos 18.3-r1-s1 18.3-r1-s1.x
juniper / junos 18.3-r1 18.3-r1.x
juniper / junos 18.3-r1-s2 18.3-r1-s2.x
juniper / junos 18.3 18.3.x
juniper / junos 18.3-r1-s6 18.3-r1-s6.x
juniper / junos 18.3-r1-s5 18.3-r1-s5.x
juniper / junos 18.3-r1-s4 18.3-r1-s4.x
juniper / junos 18.3-r1-s3 18.3-r1-s3.x

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.