CVE-2026-0229: PAN-OS: Denial of Service in Advanced DNS Security Feature

Severity: medium (CVSS 6.6 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-02-11 · updated 2026-06-17
Weakness: CWE-754

Description

A denial-of-service (DoS) vulnerability in the Advanced DNS Security (ADNS) feature of Palo Alto Networks PAN-OS® software enables an unauthenticated attacker to initiate system reboots using a maliciously crafted packet. Repeated attempts to initiate a reboot causes the firewall to enter maintenance mode. Cloud NGFW and Prisma Access® are not impacted by this vulnerability.

Affected products

Palo Alto Networks PAN-OS: from 12.1.0 before 12.1.4; from 11.2.0 before 11.2.10 — fixed in 11.2.10, 12.1.4

How to fix

Upgrade to a fixed version: Palo Alto Networks PAN-OS 11.2.10, 12.1.4. Check the vendor advisory for mitigations.

References

https://security.paloaltonetworks.com/CVE-2026-0229

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