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CVE-2020-1615

Junos OS: vMX: Default credentials supplied in vMX configuration

Critical9.8EPSS 1.8%
Published
Updated
Reserved
Assigned by
juniper

Description

The factory configuration for vMX installations, as shipped, includes default credentials for the root account. Without proper modification of these default credentials by the administrator, an attacker could exploit these credentials and access the vMX instance without authorization. This issue affects Juniper Networks Junos OS: 17.1 versions prior to 17.1R2-S11, 17.1R3-S2 on vMX; 17.2 versions prior to 17.2R3-S3 on vMX; 17.3 versions prior to 17.3R2-S5, 17.3R3-S7 on vMX; 17.4 versions prior to 17.4R2-S9, 17.4R3 on vMX; 18.1 versions prior to 18.1R3-S9 on vMX; 18.2 versions prior to 18.2R2-S7, 18.2R3-S3 on vMX; 18.2X75 versions prior to 18.2X75-D420, 18.2X75-D60 on vMX; 18.3 versions prior to 18.3R1-S7, 18.3R2-S3, 18.3R3-S1 on vMX; 18.4 versions prior to 18.4R1-S5, 18.4R2-S3, 18.4R3 on vMX; 19.1 versions prior to 19.1R1-S4, 19.1R2, 19.1R3 on vMX; 19.2 versions prior to 19.2R1-S3, 19.2R2 on vMX; 19.3 versions prior to 19.3R1-S1, 19.3R2 on vMX.

Timeline

  1. ID reserved

    By juniper

  2. · 5 months later

    Published

  3. · 4 years later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2020-1615, by who scored it
Scored byCVSSScoreVector
juniperCNA (assigner)3.1Critical9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVDNVD · Modified3.1Critical9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
1.8% · top 22% of all CVEs (7 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.

Weakness

Affected products

  • Juniper Networks · Junos OS

    • affected 17.1 – < 17.1R2-S11, 17.1R3-S2
    • affected 17.2 – < 17.2R3-S3
    • affected 17.3 – < 17.3R2-S5, 17.3R3-S7
    • affected 17.4 – < 17.4R2-S9, 17.4R3
    • affected 18.1 – < 18.1R3-S9
    • affected 18.2 – < 18.2R2-S7, 18.2R3-S3
    • affected 18.2X75 – < 18.2X75-D420, 18.2X75-D60
    • affected 18.3 – < 18.3R1-S7, 18.3R2-S3, 18.3R3-S1
    • affected 18.4 – < 18.4R1-S5, 18.4R2-S3, 18.4R3
    • affected 19.1 – < 19.1R1-S4, 19.1R2, 19.1R3
    • affected 19.2 – < 19.2R1-S3, 19.2R2
    • affected 19.3 – < 19.3R1-S1, 19.3R2

What to do

Solution: The following software releases have been updated to resolve this specific issue: 17.1R2-S11, 17.1R3-S2, 17.2R3-S3, 17.3R2-S5, 17.3R3-S7, 17.4R2-S9, 17.4R3, 18.1R3-S9, 18.2R2-S7, 18.2R3-S3, 18.2X75-D420, 18.2X75-D60, 18.3R1-S7, 18.3R2-S3, 18.3R3-S1, 18.4R1-S5, 18.4R2-S3, 18.4R3, 19.1R1-S4, 19.1R2, 19.1R3, 19.2R1-S3, 19.2R2, 19.3R1-S1, 19.3R2, 19.4R1, and all subsequent releases.

Workaround: Security best practices recommend that the root password be configured on any newly installed vMX instance prior to deployment.

Exploitation: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .