State-backed hackers hammer Palo Alto firewall zero-day before patch lands

State-backed hackers have been quietly exploiting a fresh zero-day in Palo Alto Networks firewalls to gain root access with no login required. The flaw, tracked as CVE-2026-0300 and carrying a CVSS severity rating of 9.3, affects the Captive Portal feature in PAN-OS on PA-Series and VM-Series firewalls. Palo Alto said the issue stems from a memory...

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