CVE-2025-21590

MEDIUM
2025-03-12 [email protected]
6.7
CVSS 4.0
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CVSS Vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
X

Lifecycle Timeline

3
Analysis Generated
Mar 26, 2026 - 11:20 vuln.today
Added to CISA KEV
Oct 24, 2025 - 16:44 cisa
CISA KEV
CVE Published
Mar 12, 2025 - 14:15 nvd
MEDIUM 6.7

Tags

Juniper Privilege Escalation

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.

Analysis

A security vulnerability in An Improper (CVSS 6.7) that allows a local attacker with high privileges. Risk factors: actively exploited (KEV-listed).

Technical Context

Vulnerability type not specified by vendor. Affects An Improper.

Affected Products

['An Improper']

Remediation

Monitor vendor channels for patch availability. This is CISA KEV-listed — federal agencies must remediate per BOD 22-01 deadlines.

Priority Score

94
Low Medium High Critical
KEV: +50
EPSS: +0.9
CVSS: +34
POC: 0

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CVE-2025-21590 vulnerability details – vuln.today
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