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

Published Feb 11, 2026
·
Updated

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.

Other sources

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.

Panorama, Cloud NGFW, and Prisma Access® are not impacted by this vulnerability.

— Palo Alto Networks

Affected Software

4 affected componentsFixes available
Palo Alto Networks Cloud NGFW
Palo Alto Networks PAN-OS Firewall<12.1.4, =12.1.0, <11.2.10, =11.2.0
12.1.411.2.10
Palo Alto Networks Panorama
Palo Alto Networks Prisma Access

Remediation

Mitigation

No known workarounds exist for this issue. Due to the nature of this vulnerability, a Threat Prevention Signature to detect this is also not possible. 

Information

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 11.2.0 through 11.2.9 Upgrade to 11.2.10 or later. PAN-OS 11.1 No action needed. PAN-OS 10.2 No action needed. All older   Upgrade to a supported fixed version. unsupported PAN-OS versions Prisma Access All No action needed.

Event History

Feb 11, 2026
Advisory Published
via Palo Alto Networks·05:00 PM
Data Sourced
via Palo Alto Networks·05:00 PM
RemedyDescriptionSeverityWeaknessAffected Software
CVE Published
via MITRE·05:56 PM
Data Sourced
via MITRE·05:56 PM
DescriptionWeakness
Data Sourced
via NVD·06:16 PM
DescriptionSeverityWeakness
Feb 19, 2026
Advisory Published
via Palo Alto Networks·11:30 PM
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Frequently Asked Questions

1

What is the severity of CVE-2026-0229?

The severity of CVE-2026-0229 is classified as MEDIUM.

2

How do I fix CVE-2026-0229?

To mitigate CVE-2026-0229, upgrade to a patched version of PAN-OS that addresses the vulnerability.

3

What products are affected by CVE-2026-0229?

CVE-2026-0229 affects Palo Alto Networks PAN-OS, Cloud NGFW, and Prisma Access.

4

What type of vulnerability is CVE-2026-0229?

CVE-2026-0229 is a denial-of-service (DoS) vulnerability.

5

Can an authenticated user exploit CVE-2026-0229?

No, CVE-2026-0229 can be exploited by unauthenticated attackers.

Company

Resources

Contact

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