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Palo Alto Networks PAN-OSPAN-OS: Firewall Denial of Service (DoS) in GlobalProtect Gateway and Portal

Risk 35
Severity
8.7
EPSS
0.09%
AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/AU:Y/R:U/V:D/RE:M/U:Amber

A vulnerability in Palo Alto Networks PAN-OS software enables an unauthenticated attacker to cause a denial of service (DoS) to the firewall. Repeated attempts to trigger this issue results in the firewall entering into maintenance mode.

Remedy

No known workarounds exist for this issue.

Remedy

VERSION MINOR VERSION SUGGESTED SOLUTION Cloud NGFW All No action needed. PAN-OS 12.1 12.1.2 through 12.1.3 Upgrade to 12.1.4 or later. PAN-OS 11.2 11.2.8 through 11.2.10 Upgrade to 11.2.10-h2 or later. 11.2.5 through 11.2.7 Upgrade to 11.2.7-h8 or 11.2.10-h2 or later. 11.2.0 through 11.2.4 Upgrade to 11.2.4-h15 or 11.2.10-h2 or later. PAN-OS 11.1 11.1.11 through 11.1.12 Upgrade to 11.1.13 or later. 11.1.7 through 11.1.10 Upgrade to 11.1.10-h9 or 11.1.13 later. 11.1.5 through 11.1.6 Upgrade to 11.1.6-h23 or 11.1.13 or later. 11.1.0 through 11.1.4 Upgrade to 11.1.4-h27 or 11.1.13 or later. PAN-OS 10.2 10.2.17 through 10.2.18 Upgrade to 10.2.18-h1 or later. 10.2.14 through 10.2.16 Upgrade to 10.2.16-h6 or 10.2.18-h1 or later. 10.2.11 through 10.2.13 Upgrade to 10.2.13-h18 or 10.2.18-h1 or later. 10.2.8 through 10.2.10 Upgrade to 10.2.10-h31 or 10.2.18-h1 or later. 10.2.0 through 10.2.7 Upgrade to 10.2.7-h32 or 10.2.18-h1 or later.  PAN-OS 10.1  10.1.0 through 10.1.14 Upgrade to 10.1.14-h20 or later.  All older   Upgrade to a supported fixed version. unsupported PAN-OS versions Prisma Access 11.2 11.2.0 through 11.2.7 Upgrade to 11.2.7-h8 or later.* Prisma Access 10.2 10.2.0 through 10.2.10 Upgrade to 10.2.10-h29 or later.* * See the note under Product Status for information regarding Prisma Access upgrades.
First published (updated )
CVE-2026-0227

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