Vulnerability · Published Jan 15, 2026 · Assigned by palo_alto
CVE-2026-0227PAN-OS: Firewall Denial of Service (DoS) in GlobalProtect Gateway and Portal
Medium 6.6
In plain English
A medium-severity security flaw in Cloud NGFW from Palo Alto Networks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 55% of all known vulnerabilities).
Severity (CVSS 4.0)6.6Medium
Exploit odds (30 days)0.7%top 45.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Palo Alto Networks | Cloud NGFW | see references |
| Palo Alto Networks | PAN-OS | 12.1.2 – before 12.1.4, 12.1.3-h311.2.0 – before 11.2.10-h2, 11.2.7-h8, 11.2.4-h1511.1.0 – before 11.1.13, 11.1.10-h9, 11.1.6-h23, 11.1.4-h2710.2.0 – before 10.2.18-h1, 10.2.16-h6, 10.2.13-h18, 10.2.10-h30, 10.2.7-h3210.1.0 – before 10.1.14-h20 |
| Palo Alto Networks | Prisma Access | 11.2 – before 11.2.7-h810.2 – before 10.2.10-h29, 10.2.4-h43 |
Weakness: CWE-754 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/AU:Y/R:U/V:D/RE:M/U:Amber
References
- https://security.paloaltonetworks.com/CVE-2026-0227 vendor-advisory