CVE-2025-21590

Juniper — Juniper Junos OS Improper Isolation or Compartmentalization Vulnerability

CISA KEV · in the CISA KEV catalog since 2025-03-13

What EVULNABLE says

EVULNABLE Risk · priority 75/100 Urgent Raised to the floor for a confirmed exploited vulnerability. Intelligence coverage 75/90 — no pre-patch disclosure data
Overdue by 17 monthsCISA KEVActively Exploited

Why it matters: Listed in the CISA KEV catalog, and Confirmed exploitation in the wild.

Patch This Cycle

The priority band answers “how soon”, not “how bad” — see Methodology for what it weighs and where it abstains.

The evidence behind it

Published measurements for CVE-2025-21590
MeasureValueSource
CVSS base score 6.7 NVD
FIRST EPSS 0.017 (75.8th pctl) FIRST
Actively exploited Confirmed CISA KEV
Ransomware campaign use Unknown or none CISA KEV
CISA remediation deadline 2025-04-03 — Overdue by 17 months CISA KEV
Intelligence coverage 75/90 — no pre-patch disclosure data

What CISA says to do

This page is an opinion about urgency. Where it and a source of record disagree, the source of record is the record.

NVD ↗ CISA KEV ↗ Vendor Advisory ↗