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MediumPublic exploit

DoS in Palo Alto Networks PAN-OS Advanced DNS Security

IdentifiersCVE-2026-0229CWE-20

CVE-2026-0229 is a denial-of-service vulnerability in the Advanced DNS Security (ADNS) feature of Palo Alto Networks PAN-OS. According to the provided advisory text, an unauthenticated attacker can send a maliciously crafted packet to trigger a system reboot. Repeated exploitation attempts can cause the affected firewall to enter maintenance mode. The issue affects PAN-OS releases including 12.1 versions prior to 12.1.4, 11.2 versions prior to 11.2.8 and prior to 11.2.10, 11.1 versions prior to 11.1.11, and 10.2 versions prior to 10.2.17. Cloud NGFW and Prisma Access are stated to be unaffected.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation causes loss of availability of the affected firewall. An unauthenticated remote attacker can force device reboots, and repeated triggering can drive the firewall into maintenance mode, resulting in sustained denial of service and interruption of firewall-provided network security and traffic handling functions.

Mitigation

If you can’t patch tonight, do this now.

The provided content does not include specific mitigations beyond applying vendor fixes. As an interim risk-reduction measure, organizations should limit exposure of affected firewalls to untrusted traffic where operationally feasible and monitor for unexpected reboots or transitions into maintenance mode until patches are applied.

Remediation

Patch, then assume compromise.

Upgrade PAN-OS to a fixed release identified by Palo Alto Networks. Based on the provided content, fixed versions include PAN-OS 12.1.4 or later, 11.2.8/11.2.10 or later as applicable to the affected branch, 11.1.11 or later, and 10.2.17 or later. Administrators should review the relevant Palo Alto Networks security advisory and apply the vendor-recommended updates.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
Palo Alto NetworksPan-Osoperating_system

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

15 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

15 SOURCESView more in app
What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.
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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity13

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2026-0229
NVD
nvd.nist.gov/vuln/detail/CVE-2026-0229
MITRE CWE · CWE-20
cwe.mitre.org
security.paloaltonetworks.com
security.paloaltonetworks.com/CVE-2026-0229