CVE-2025-21590

MEDIUMCISA KEV

4.4

Description

An Improper Isolation or Compartmentalization vulnerability in the kernel of Juniper Networks Junos OS allows a local attacker with high privileges to compromise the integrity of the device. A local attacker with access to the shell is able to inject arbitrary code which can compromise an affected device. This issue is not exploitable from the Junos CLI. This issue affects Junos OS: * All versions before 21.2R3-S9, * 21.4 versions before 21.4R3-S10, * 22.2 versions before 22.2R3-S6, * 22.4 versions before 22.4R3-S6, * 23.2 versions before 23.2R2-S3, * 23.4 versions before 23.4R2-S4, * 24.2 versions before 24.2R1-S2, 24.2R2.

CVE Details

CVSS v3.1 Score4.4

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N

Attack VectorLOCAL

ComplexityLOW

Privileges RequiredHIGH

User InteractionNONE

Published3/12/2025

Last Modified10/24/2025

Sourcekev

Honeypot Sightings0

CISA KEV

VendorJuniper

ProductJunos OS

Vulnerability NameJuniper Junos OS Improper Isolation or Compartmentalization Vulnerability

KEV Date Added2025-03-13

Remediation Due Date2025-04-03

Ransomware UseUnknown

Affected Products

juniper:junos

Weaknesses (CWE)

CWE-653

References

https://cloud.google.com/blog/topics/threat-intelligence/china-nexus-espionage-targets-juniper-routers(sirt@juniper.net)

https://supportportal.juniper.net/JSA93446(sirt@juniper.net)

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-21590(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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