CVE-2026-0229 PAN-OS: Denial of Service in Advanced DNS Security Feature
An unauthenticated attacker can cause a denial of service by sending malicious packets to the Advanced DNS Security feature, forcing the firewall into maintenance mode.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-0229?
CVE-2026-0229 is a medium-severity denial of service vulnerability in Palo Alto Networks Cloud NGFW, published on 11 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-754
Which versions are affected by CVE-2026-0229?
How do I fix CVE-2026-0229?
No fix has been published for CVE-2026-0229 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-0229 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-0229 exists.
Sources
Also known as GHSA-cpfh-q3v8-wj73.