Hackers Exploit Palo Alto PAN-OS 0-day Flaw to Gain Root Code Execution on Firewalls

Hackers are exploiting a high-severity flaw in Palo Alto Networks PAN-OS that allows authenticated attackers to run code with root privileges on affected firewalls. Tracked as CVE-2026-0322, the vulnerability affects the management interface, with the company confirming “very limited exploitation” and urging customers to apply fixes as soon as possible. Palo Alto Networks published its security advisory on October 14, 2026, assigning the flaw a CVSS 4.0 score of 8.6 and its highest remediation urgency. The company credited internal researcher Suraj Siddharudh with discovering and reporting the issue. It has not named the attackers or disclosed how many organizations were targeted. PAN-OS 0-Day Vulnerability The flaw is a code...

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