CVE-2021-0245

Local privilege escalation via hard-coded satellite credentials

Published Apr 22, 2021 · Updated Sep 16, 2024

Hard-coded credentials in Juniper Networks Junos OS on Junos Fusion satellites allow local users to elevate privileges and control the device. Juniper has not published which satellite account or authentication path embeds or accepts the credentials. A local low-privileged foothold on an affected satellite is required; successful use grants control of the satellite.

CVSS severity7.8
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Hard-coded credentials in Juniper Networks Junos OS on Junos Fusion satellites allow local users to elevate privileges and control the device. Juniper has not published which satellite account or authentication path embeds or accepts the credentials. A local low-privileged foothold on an affected satellite is required; successful use grants control of the satellite.

The record

CVE
CVE-2021-0245
Published
Apr 22, 2021
Updated
Sep 16, 2024
Vendor
Juniper Networks
Product
Junos OS
Classifications
CWE-798, T1078.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 22, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=16.1 <16.1R7-S7
  2. Affected versionversion=17.1 <17.1R2-S12, 17.1R3-S2
  3. Affected versionversion=17.2 <17.2R3-S4
  4. Affected versionversion=17.3 <17.3R3-S8
  5. Affected versionversion=17.4 <17.4R2-S10 changes=[{"at":"17.4R3","status":"affected"}]
  6. Affected versionversion=18.1 <18.1R3-S10
  7. Affected versionversion=18.2 <18.2R2-S7, 18.2R3-S3
  8. Affected versionversion=18.3 <18.3R1-S7, 18.3R2-S4, 18.3R3-S2
  9. Affected versionversion=18.4 <18.4R1-S6, 18.4R2-S4, 18.4R3-S1
  10. Affected versionversion=19.1 <19.1R1-S5, 19.1R2-S1, 19.1R3
  11. Affected versionversion=19.2 <19.2R1-S4, 19.2R2
  12. Affected versionversion=19.3 <19.3R2-S5, 19.3R3
  13. Affected versionversion=19.4 <19.4R1-S1, 19.4R2
  14. Affected versionversion=20.1 <20.1R1-S1, 20.1R2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Juniper Networks · Junos OSversion=16.1 <16.1R7-S7; version=17.1 <17.1R2-S12, 17.1R3-S2; version=17.2 <17.2R3-S4; version=17.3 <17.3R3-S8; version=17.4 <17.4R2-S10 changes=[{"at":"17.4R3","status":"affected"}]; version=18.1 <18.1R3-S10; version=18.2 <18.2R2-S7, 18.2R3-S3; version=18.3 <18.3R1-S7, 18.3R2-S4, 18.3R3-S2; version=18.4 <18.4R1-S6, 18.4R2-S4, 18.4R3-S1; version=19.1 <19.1R1-S5, 19.1R2-S1, 19.1R3; version=19.2 <19.2R1-S4, 19.2R2; version=19.3 <19.3R2-S5, 19.3R3; version=19.4 <19.4R1-S1, 19.4R2; version=20.1 <20.1R1-S1, 20.1R2

Published CVSS scores

7.2NIST NVDAV:L/AC:L/Au:N/C:C/I:C/A:C
7.8Juniper Networks, Inc.CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-798Use of Hard-coded Credentials
T1078.001Valid Accounts: Default Accounts

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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