Palo Alto Networks disclosed a high-severity remote code execution zero-day, tracked as CVE-2026-0322, that is being exploited against PAN-OS management interfaces. The flaw allows authenticated attackers with network access to run code as root on vulnerable devices. It scores 8.6 and affects PA-Series and VM-Series firewalls, Panorama virtual and M-Series appliances; Cloud NGFW and Prisma Access are not impacted. Exploitation requires existing credentials and access to the management interface, so immediate mitigation steps include restricting management access to trusted internal IPs. No complete workarounds exist, though customers with Threat Prevention subscriptions can enable signatures that give limited detection of known attack patterns but will not catch all variants.
Palo Alto released patches for PAN-OS 10.2, 11.1, 11.2, 12.1 and 12.2, with an 11.2.16 fix scheduled for October 15; older unsupported releases must be upgraded. The vulnerability was discovered internally by Suraj Siddharudh, and Palo Alto reported “very limited” observed exploitation while sharing three IPs linked to attacks (66.42.72.14, 208.83.239.114, 149.248.47.234). CISA added CVE-2026-0322 to its Known Exploited Vulnerabilities catalog and mandated mitigation by October 17 for federal civilian agencies. Customers are urged to apply vendor fixes and tighten management-plane access immediately.
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