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CVE-2025-21590: Juniper Junos OS

EPSS1.7%No. 1606 of 1739 in KEV
CVE year2025listed the same year
Same vendor in KEV8
Same product7
FieldValue
VendorJuniper
ProductJunos OS
NameJuniper Junos OS Improper Isolation or Compartmentalization Vulnerability
Added to KEV2025-03-13
US federal due date2025-04-03
Ransomware useUnknown
CWECWE-653

CISA 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.

Other entries for this product

CVEVendor / productAddedEPSSRansomware
CVE-2023-36851Juniper Junos OS2023-11-131.1%Unknown
CVE-2023-36847Juniper Junos OS2023-11-1383.4%Unknown
CVE-2023-36846Juniper Junos OS2023-11-1393.4%Unknown
CVE-2023-36845Juniper Junos OS2023-11-1395.0%Unknown
CVE-2023-36844Juniper Junos OS2023-11-1389.9%Unknown
CVE-2020-1631Juniper Junos OS2022-03-254.8%Unknown

NVD — CVE-2025-21590

Data from CISA's Known Exploited Vulnerabilities (KEV) catalog. EPSS is FIRST's estimated probability of exploitation activity in the next 30 days, refreshed weekly. Always follow the vendor's official guidance.
About this page

A Juniper Junos OS vulnerability added to CISA's Known Exploited Vulnerabilities catalog on 2025-03-13.