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TechRadar
TechRadar
Sead Fadilpašić

Palo Alto patches a worrying security issue which could crash your firewall without even logging in

Laptop with warning symbols over the keyboard.
  • Palo Alto patched CVE-2026-0227, a DoS flaw in GlobalProtect Gateway and Portal
  • Vulnerability could force firewalls into maintenance mode; severity rated 7.7/10
  • Cloud NGFW unaffected; patches required as no workarounds exist, no abuse reported yet

Palo Alto says it has fixed a high-severity vulnerability in some of its products that allowed malicious actors to run Denial of Service (DoS) attacks and place the compromised instances in maintenance mode.

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