Unrated severityNVD Advisory· Published Jan 15, 2026· Updated Jan 30, 2026
PAN-OS: Firewall Denial of Service (DoS) in GlobalProtect Gateway and Portal
CVE-2026-0227
Description
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.
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Affected products
4cpe:2.3:o:palo_alto_networks:pan-os:12.1.3:h1:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:palo_alto_networks:pan-os:12.1.3:h1:*:*:*:*:*:*range: 12.1.2
- (no CPE)
- Range: All
- Range: 11.2
Patches
Vulnerability mechanics
References
1- security.paloaltonetworks.com/CVE-2026-0227mitrevendor-advisory
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