A buffer overflow vulnerability in the User-ID™ Authentication Portal (aka Captive Portal) service of Palo Alto Networks PAN-OS software allows an unauthenticated attacker to execute arbitrary code with root privileges on the PA-Series and VM-Series firewalls by sending specially crafted packets. The risk of this issue is greatly reduced if you secure access to the User-ID™ Authentication Po
Palo Alto PAN-OS | Palo Alto Networks
APT
CVE-2026-0300
NVD
Refer to CVE-2026-0300 NVD advisory