Is CVE-2025-21590 actively exploited?

Yes. CVE-2025-21590 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2025-21590 be exploited remotely?

The attack vector of CVE-2025-21590 has not been classified yet.

What is the CVSS score of CVE-2025-21590?

CVE-2025-21590 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2025-21590

HIGHCISA KEVIN THE WILD

CVE-2025-21590

Published: March 13, 2025

EPSS:0.89%probability of exploitation in 30 daysPercentile:75.2th

Official Description

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

NVD Source

CISA KEV Advisory

Juniper Junos OS Improper Isolation or Compartmentalization Vulnerability

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

Added to KEV: 2025-03-13Federal patch deadline: 2025-04-03

Required Action (CISA)

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

Risk Analysis

This high-severity vulnerability in Juniper Junos OS involves improper isolation or compartmentalization, allowing a local attacker with high privileges to inject arbitrary code. While a CVSS score is not available, its inclusion in CISA's KEV catalog and an EPSS score of 0.00887 indicate a confirmed and notable exploitation risk.

This vulnerability has been actively exploited in the wild, as confirmed by its presence in CISA's Known Exploited Vulnerabilities catalog.

Recommended Action

Apply the latest security updates for Juniper Junos OS to mitigate this arbitrary code injection vulnerability. Implement strong access controls and monitor for suspicious activity on highly privileged accounts.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2025-21590 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2025-21590 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.