High severity · published Jan 15, 2026
CVE-2026-0227
A vulnerability in Palo Alto Networks PAN-OS software enables an unauthenticated attacker to cause a denial of service (DoS) to the firewall
7.5
CVSS
0.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 54% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PA
PAN-OS · Palo Alto Networks
10.1.0 before 10.1.14; 10.2.0 before 10.2.7; 10.2.8 before 10.2.10; 10.2.11 before 10.2.13; 10.2.14 before 10.2.16; 11.1.0 before 11.1.4; +34 more · source: NVD
PA
Prisma Access · Paloaltonetworks
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-0227
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-0227
Vendor Advisory
https://security.paloaltonetworks.com/CVE-2026-0227
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