Cyberfeed6 › Vendors › Juniper
CISA lists 8 Juniper vulnerabilities as exploited in real attacks. Most entries concern Junos OS, ScreenOS.
Showing the 8 most recently added of 8. Check the vendor notice before you act: it names the fixed versions.
| Vulnerability | Product | Added to list | Severity | Ransomware | Fix |
|---|---|---|---|---|---|
| CVE-2015-7755Juniper ScreenOS Improper Authentication Vulnerability | ScreenOS | 2025-10-02 | Critical (9.8) | No | Vendor notice |
| CVE-2025-21590Juniper Junos OS Improper Isolation or Compartmentalization Vulnerability | Junos OS | 2025-03-13 | Medium (4.4) | No | Vendor notice |
| CVE-2023-36851Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnerability | Junos OS | 2023-11-13 | Medium (5.3) | No | Vendor notice |
| CVE-2023-36847Juniper Junos OS EX Series Missing Authentication for Critical Function Vulnerability | Junos OS | 2023-11-13 | Medium (5.3) | No | Vendor notice |
| CVE-2023-36846Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnerability | Junos OS | 2023-11-13 | Medium (5.3) | No | Vendor notice |
| CVE-2023-36845Juniper Junos OS EX Series and SRX Series PHP External Variable Modification Vulnerability | Junos OS | 2023-11-13 | Critical (9.8) | No | Vendor notice |
| CVE-2023-36844Juniper Junos OS EX Series PHP External Variable Modification Vulnerability | Junos OS | 2023-11-13 | Medium (5.3) | No | Vendor notice |
| CVE-2020-1631Juniper Junos OS Path Traversal Vulnerability | Junos OS | 2022-03-25 | High (8.8) | No |
Source: CISA Known Exploited Vulnerabilities catalog, released 2026-11-04. Severity scores are CVSS where available. "Ransomware" means CISA has marked the flaw as known to be used in ransomware campaigns.