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Palo Alto Networks Firewall Vulnerability Allows Attackers To Trigger Denial Of Service

Gbhackers •Varshini • January 15, 2026

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Palo Alto Networks Firewall Vulnerability Allows Denial of Service Attacks Palo Alto Networks has addressed a critical denial-of-service vulnerability in its PAN-OS firewall software, identified as CVE-2026-0227. This flaw enables unauthenticated attackers to disrupt GlobalProtect gateways and portals, with a CVSS v4.0 base score of 7.7, due to improper checks that lead firewalls into maintenance mode after repeated exploitation attempts. 2 sources 30

Palo Alto Networks Firewall Vulnerability Allows Attackers To Trigger Denial Of Service

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