Juniper Networks security advisory (AV26-172)

Serial number: AV26-172
Date: February 25, 2026

On February 25, 2026, Juniper Networks published a security advisory to address vulnerabilities in the following products. Included was a critical update for the following:

• Junos OS Evolved on PTX Series – 25.4 versions prior to 25.4R1-S1-EVO, 25.4R2-EVO

The Cyber Centre encourages users and administrators to review the provided web links and apply the necessary updates.

• 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)
• Juniper Networks