Product · KEV exposure
Juniper Junos OS known exploited vulnerabilities
We track 7 CVEs in Juniper Junos OS. All of them are on CISA's Known Exploited Vulnerabilities catalog, meaning CISA has evidence of exploitation in the wild (listed 2022–2025). The most recent is CVE-2025-21590, added to KEV on .
- CVEs tracked
- 7
- On CISA KEV
- 7
- Ransomware use
- 0
- Rated critical
- 1
Every Juniper Junos OS CVE we track
| CVE / Vulnerability | Severity | CVSS | EPSS | Added to KEV | Patch by |
|---|---|---|---|---|---|
| CVE-2025-21590 Juniper Junos OS Improper Isolation or Compartmentalization Vulnerability | [ MEDIUM ] | 4.4 | 1.7% | ||
| CVE-2023-36851 Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnerability | [ MEDIUM ] | 5.3 | 1.1% | ||
| CVE-2023-36847 Juniper Junos OS EX Series Missing Authentication for Critical Function Vulnerability | [ MEDIUM ] | 5.3 | 83.5% | ||
| CVE-2023-36846 Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnerability | [ MEDIUM ] | 5.3 | 93.5% | ||
| CVE-2023-36845 Juniper Junos OS EX Series and SRX Series PHP External Variable Modification Vulnerability | [ CRITICAL ] | 9.8 | 95.1% | ||
| CVE-2023-36844 Juniper Junos OS EX Series PHP External Variable Modification Vulnerability | [ MEDIUM ] | 5.3 | 90.0% | ||
| CVE-2020-1631 Juniper Junos OS Path Traversal Vulnerability | [ HIGH ] | 8.8 | 4.9% |
Sorted by date added to KEV. Severity and CVSS as stated by NVD or the vendor; EPSS from FIRST.org. "Patch by" is CISA's BOD 22-01 deadline for US federal agencies, a useful priority signal for everyone else. Machine-readable: /api/v1/vendors/juniper.json.
Every row links to its CVE record with the CISA required action, catalog coverage and primary sources. We describe impact and remediation only; no exploit code. See the full KEV tracker or compare KEV catalogs.