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CVE-2026-0300

CRITICAL CISA
CVSS Score
N/A
Severity
CRITICAL
Source
CISA
Published
May 06, 2026
Description

Palo Alto Networks — PAN-OS: Palo Alto Networks PAN-OS contains an out-of-bounds write vulnerability in the User-ID Authentication Portal (aka Captive Portal) service that can allow an unauthenticated attacker to execute arbitrary code with root privileges on the PA-Series and VM-Series firewalls by sending specially crafted packets.

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