ID:12724 - Exploit for Out-of-bounds write in Palo Alto PAN-OS - CVE-2026-0300

Link to public exploit:

Vulnerability description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error within the User-ID Authentication Portal (aka Captive Portal) service. A remote attacker can send specially crafted packets to the device, trigger an out-of-bounds write and execute arbitrary code with root privileges on the PA-Series and VM-Series firewalls.

Note, the vulnerability is being actively exploited in the wild.

Remediation