Actively exploited · Published Mar 12, 2025 · Assigned by juniper
CVE-2025-21590Junos OS: An local attacker with shell access can execute arbitrary code
Medium 4.4 Exploited
In plain English
A medium-severity security flaw in Junos OS from Juniper Networks. Attackers are actively exploiting it in the wild (listed by CISA on March 13, 2025). The chance it is exploited in the next 30 days is estimated at 1.7% (higher than 78% of all known vulnerabilities). 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 guidance
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Federal agencies must remediate by Apr 3, 2025.
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Juniper Networks | Junos OS | 0 – before 21.2R3-S921.4 – before 21.4R3-S1022.2 – before 22.2R3-S622.4 – before 22.4R3-S623.2 – before 23.2R2-S323.4 – before 23.4R2-S424.2 – before 24.2R1-S2, 24.2R2 |
Weakness: CWE-653 · Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N