Home › Exploited CVEs › CVE-2025-21590
CVE-2025-21590: Juniper Junos OS Improper Isolation or Compartmentalization Vulnerability
Juniper Junos OS · in CISA KEV since 2025-03-13
2025-03-13added to KEV
2025-04-03federal remediation due date
1.71%EPSS exploit probability (30 days) 76.4th percentile
6.7 MEDIUMCVSS 4.0
Unknownknown ransomware use
1days from NVD publication to KEV
What it is
Juniper Junos OS contains an improper isolation or compartmentalization vulnerability. This vulnerability could allows a local attacker with high privileges to inject arbitrary code.
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.
| CWE | CWE-653 |
|---|---|
| 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 |
| NVD published | 2025-03-12 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2025-21590.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.