CVE-2025-21590Junos OS: An local attacker with shell access can execute arbitrary code
An Improper Isolation or Compartmentalization vulnerability in the kernel of Juniper Networks Junos OS allows a local attacker with high privileges to compromise the integrity of the device. A local attacker with access to the shell is able to inject arbitrary code which can compromise an affected device. This issue is not exploitable from the Junos CLI. This issue affects Junos OS: * All versions before 21.2R3-S9, * 21.4 versions before 21.4R3-S10, * 22.2 versions before 22.2R3-S6, * 22.4 versions before 22.4R3-S6, * 23.2 versions before 23.2R2-S3, * 23.4 versions before 23.4R2-S4, * 24.2 versions before 24.2R1-S2, 24.2R2.
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 6.7 | MEDIUM | 4.0juniper (CNA) | CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N |
| 4.4 | MEDIUM | 3.1juniper (CNA) | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N |
CISA required action
⚡ Known exploited · remediation due Apr 3, 2025
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Details
- CVE ID
- CVE-2025-21590
- Status
- Analyzed
- Assigner (CNA)
- juniper
- Published
- Mar 12, 2025
- Last modified
- 2026-10-01 18:23 UTC
- Weaknesses
- CWE-653 · Improper Isolation or Compartmentalization
Affected Products
As published by the CNA in the CVE record.
Juniper NetworksJunos OS7 version ranges
- before 21.2R3-S9
- 21.4 before 21.4R3-S10
- 22.2 before 22.2R3-S6
- 22.4 before 22.4R3-S6
- 23.2 before 23.2R2-S3
- 23.4 before 23.4R2-S4
- 24.2 before 24.2R1-S2, 24.2R2