March 13, 2025 · Applied Cybernetics Group
CVE-2025-21590 — Juniper Junos OS
Juniper Junos OS Improper Isolation or Compartmentalization Vulnerability
- Added to KEV
2025-03-13- Federal due date
2025-04-03- Vendor
- Juniper
- Product
- Junos OS
- EPSS
- 82.7th percentile (score 0.017, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2025-21590
CISA short 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.
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.