CVE-2025-21590 · netVigilance record NV25-0062
Juniper Junos OS Improper Isolation or Compartmentalization
past due
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.
CISA deadline 2025-04-03 · passed 1 year 5 months ago · applies to US federal civilian agencies; used elsewhere as a reference SLA
What happened
Juniper Junos OS contains an improper isolation or compartmentalization vulnerability. This vulnerability could allows a local attacker with high privileges to inject arbitrary code.
Who is affected
Juniper Junos OS. Affected version ranges are listed in the vendor advisory and the NVD entry linked under Sources.
Weakness class: CWE-653.
Timeline
- Added to CISA KEVExploitation in the wild confirmed by CISA
- CISA remediation deadlinepassed 1 year 5 months ago
Sources
- NVD entry for CVE-2025-21590 nvd.nist.gov/vuln/detail/CVE-2025-21590
- CISA Known Exploited Vulnerabilities catalog www.cisa.gov/known-exploited-vulnerabilities-catalog
- supportportal.juniper.net supportportal.juniper.net/s/article/2025-03-Out-of-Cycle-Security-Bulletin-Junos-OS-A-local-attacker-with-shell-access-can-execute-arbitrary-code-CVE-2025-21590?language=en_US
- nvd.nist.gov nvd.nist.gov/vuln/detail/CVE-2025-21590