What is CVE-2026-0227 affecting Palo Alto?

CVE-2026-0227 is a high-severity denial-of-service vulnerability in Palo Alto Networks' GlobalProtect Gateway and Portal.

Which Palo Alto products are vulnerable to DoS attacks?

Palo Alto Networks PAN-OS software in GlobalProtect Gateway and Portal configurations is vulnerable; Cloud NGFW is unaffected.

How can I fix the Palo Alto GlobalProtect vulnerability?

The only way to address CVE-2026-0227 is by applying the security patch released by Palo Alto Networks.

Home / Technology / Palo Alto Fixes DoS Flaw: Patch Now!

Palo Alto Fixes DoS Flaw: Patch Now!

15 Jan

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Summary

High-severity DoS vulnerability found in GlobalProtect Gateway/Portal.
PAN-OS software flaw could lead to firewall denial of service.
No workarounds exist; patching is the only solution for this flaw.

Palo Alto Networks has issued a critical security advisory for a high-severity vulnerability in its GlobalProtect Gateway and Portal components. The flaw, tracked as CVE-2026-0227, carries a severity score of 7.7 out of 10 and enables unauthenticated attackers to initiate denial-of-service attacks.

Exploitation of this vulnerability could lead to firewalls entering a maintenance mode, disrupting services. While Palo Alto Networks' Cloud Next-Generation Firewall is not impacted, there are currently no workarounds to mitigate the threat. The company strongly advises immediate application of the provided patch.

Palo Alto Networks has confirmed that upgrades for affected Prisma Access customers are nearly complete. Although there is no evidence of the vulnerability being exploited in the wild to date, prompt patching is essential to safeguard network security.

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