Juniper Junos OS Remote Code Execution Vulnerability

Release Date: 27 Feb 2026 14463 Views

RISK: Medium Risk

TYPE: Operating Systems - Networks OS

A vulnerability has been identified in Juniper Junos OS. A remote attacker could exploit this vulnerability to trigger remote code execution on the targeted system.

Impact

Remote Code Execution

System / Technologies affected

Junos OS Evolved on PTX Series 25.4 versions before 25.4R1-S1-EVO
Junos OS Evolved on PTX Series 25.4 versions before 25.4R2-EVO

Please refer to the link below for detail:

https://supportportal.juniper.net/s/article/2026-02-Out-of-Cycle-Security-Bulletin-Junos-OS-Evolved-PTX-Series-A-vulnerability-allows-a-unauthenticated-network-based-attacker-to-execute-code-as-root-CVE-2026-21902

Solutions

Before installation of the software, please visit the vendor web-site for more details.

https://supportportal.juniper.net/s/article/2026-02-Out-of-Cycle-Security-Bulletin-Junos-OS-Evolved-PTX-Series-A-vulnerability-allows-a-unauthenticated-network-based-attacker-to-execute-code-as-root-CVE-2026-21902

Vulnerability Identifier

CVE-2026-21902

Source

Juniper Network