ACTIVELY EXPLOITED
CVE-2025-21590: Juniper Junos OS Improper Isolation or Compartmentalization Vulnerability
| Vendor | Juniper |
|---|---|
| Product | Junos OS |
| Actively exploited | Yes |
| Added to CISA KEV | 13 Mar 2025 |
| CISA federal deadline | 3 Apr 2025 |
| Weakness (CWE) | CWE-653 |
Required action (CISA's text)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Description (NVD)
Juniper Junos OS contains an improper isolation or compartmentalization vulnerability. This vulnerability could allows a local attacker with high privileges to inject arbitrary code.
SOURCES
Other Juniper flaws
- CVE-2015-7755: Juniper ScreenOS Improper Authentication Vulnerability
- CVE-2023-36851: Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnerability
- CVE-2023-36847: Juniper Junos OS EX Series Missing Authentication for Critical Function Vulnerability
- CVE-2023-36846: Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnerability
- CVE-2023-36845: Juniper Junos OS EX Series and SRX Series PHP External Variable Modification Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.