Home / Vulnerabilities / CVE-2025-21590
MEDIUM SEVERITY
CVE-2025-21590 Juniper · Junos OS

Juniper Junos OS Improper Isolation or Compartmentalization Vulnerability

Technical Severity

CVSS v3.1 Metrics

MEDIUM
4.4 / 10
Minimal Risk Critical
Vector Specification
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Exploitation Likelihood

EPSS Prediction

2.74 %
Predictive Probability
Percentile Rank
85.6 th

Documented as more likely to be exploited than 85.6% of known CVEs.

Detection Date

Mar 13, 2025

Remediation Due

Apr 03, 2025

CISA Catalog Active

Threat Analysis

Juniper Junos OS contains an improper isolation or compartmentalization vulnerability. This vulnerability could allows a local attacker with high privileges to inject arbitrary code.

Remediation Directive

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

External Intelligence

https://supportportal.juniper.net/s/article/2025-03-Out-of-Cycle-Security-Bulletin-Junos-OS-A-local-attacker-with-shell-access-can-execute-arbitrary-code-CVE-2025-21590?language=en_US

https://supportportal.juniper.net/s/article/2025-03-Out-of-Cycle-Security-Bulletin-Junos-OS-A-local-attacker-with-shell-access-can-execute-arbitrary-code-CVE-2025-21590?language=en_US
NVD

National Vulnerability Database

https://nvd.nist.gov/vuln/detail/CVE-2025-21590