CVE-2021-0248

NFX Series: Hard-coded credentials allow an attacker to take control of any instance through administrative interfaces.

CRITICAL
10
CVSS Score
Published: April 22, 2021 at 07:37 PM UTC
Updated: June 17, 2026 at 03:29 AM UTC
4 products affected across 2 vendorsJunosNfx250Nfx150

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Severity
CRITICAL10
Exploit prediction
EPSS 1%

Description

This issue is not applicable to NFX NextGen Software. On NFX Series devices the use of Hard-coded Credentials in Juniper Networks Junos OS allows an attacker to take over any instance of an NFX deployment. This issue is only exploitable through administrative interfaces. This issue affects: Juniper Networks Junos OS versions prior to 19.1R1 on NFX Series. No other platforms besides NFX Series devices are affected.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 19.1v < 19.1R119.1
Affected range stops below 19.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 19.1R1, so it looks safe — our inference, not a vendor statement
juniper-nfx150 (environment) · juniper-nfx250 (environment) · juniper-nfx350 (environment)
All versions
All versions
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_MISCVendor Advisory
https://kb.juniper.net/JSA11141

CVSS

10CRITICALjuniper
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-798

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