Juniper Networks Junos OS

7 known vulnerabilities in Juniper Networks Junos OS, 2 critical, 7 actively exploited, with patch priority, exploit likelihood and the news covering them.

Recently exploited

  • CVE-2025-21590 CVSS 6.7 medium · actively exploited Juniper Junos OS Improper Isolation or Compartmentalization Vulnerability
  • CVE-2023-36851 CVSS 5.3 medium · actively exploited Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnerability
  • CVE-2023-36847 CVSS 5.3 medium · actively exploited Juniper Junos OS EX Series Missing Authentication for Critical Function Vulnerability
  • CVE-2023-36846 CVSS 5.3 medium · actively exploited Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnerability
  • CVE-2023-36845 CVSS 9.8 critical · actively exploited Juniper Junos OS EX Series and SRX Series PHP External Variable Modification Vulnerability
  • CVE-2023-36844 CVSS 5.3 medium · actively exploited Juniper Junos OS EX Series PHP External Variable Modification Vulnerability
  • CVE-2020-1631 CVSS 9.8 critical · actively exploited Juniper Junos OS Path Traversal Vulnerability

Latest vulnerabilities

  • CVE-2025-21590 CVSS 6.7 medium · actively exploited Juniper Junos OS Improper Isolation or Compartmentalization Vulnerability
  • CVE-2023-36851 CVSS 5.3 medium · actively exploited Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnerability
  • CVE-2023-36847 CVSS 5.3 medium · actively exploited Juniper Junos OS EX Series Missing Authentication for Critical Function Vulnerability
  • CVE-2023-36846 CVSS 5.3 medium · actively exploited Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnerability
  • CVE-2023-36845 CVSS 9.8 critical · actively exploited Juniper Junos OS EX Series and SRX Series PHP External Variable Modification Vulnerability
  • CVE-2023-36844 CVSS 5.3 medium · actively exploited Juniper Junos OS EX Series PHP External Variable Modification Vulnerability
  • CVE-2020-1631 CVSS 9.8 critical · actively exploited Juniper Junos OS Path Traversal Vulnerability