# 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.

- **Severity:** Medium 6.6 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 Feb 2026
- **Updated:** 11 Feb 2026
- **Also known as:** GHSA-cpfh-q3v8-wj73

## 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 (Improper Check for Unusual or Exceptional Conditions)

## 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.

## Is CVE-2026-0229 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-0229 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-0229 and fix it if it is affected.

What it is: 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.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-0229 exists.

Affected product: Palo Alto Networks Cloud NGFW. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-0229/ (Markdown: https://insights.sbomify.com/CVE-2026-0229/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-0229
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-0229
- OSV: https://osv.dev/vulnerability/CVE-2026-0229

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-0229/
Summaries are generated and may contain mistakes; the official description above is the record.