Critical Palo Alto PAN-OS Vulnerability CVE-2026-0300 Actively Exploited — Unauthenticated Root RCE on Firewalls
Palo Alto Networks is warning of a critical CVE-2026-0300 buffer overflow in PAN-OS Captive Portal that enables unauthenticated root-level remote code execution on PA-Series and VM-Series firewalls. Active exploitation is confirmed; patches roll out May 13–28, 2026.
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