Juniper Junos OS Improper Isolation or Compartmentalization Vulnerability (CVE-2025-21590)
Severity: medium · Patch status: unknown · Since 2025-03-13 · CVE-2025-21590
Juniper Junos OS contains an improper isolation or compartmentalization vulnerability. This vulnerability could allows a local attacker with high privileges to inject arbitrary code. CISA added CVE-2025-21590 to its Known Exploited Vulnerabilities catalog on Mar 13, 2025, which means attackers are exploiting it in the wild.
What to do
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- US federal agencies must remediate by Apr 3, 2025 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
