# CVE-2024-3393: PAN-OS: Firewall Denial of Service (DoS) in DNS Security Using a Specially Crafted Packet

> CVE-2024-3393: PAN-OS: Firewall Denial of Service (DoS) in DNS Security Using a Specially Crafted Packet. CVSS 7.5 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2024-3393
Last updated: 2026-06-17T07:44:11Z

- Published: 2024-12-27 09:44 UTC · Updated: 2026-06-17 07:44 UTC · Assigner: palo\_alto
- CVSS: 7.5 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS: 29.1%, 98th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2024-12-30, federal due date 2025-01-20, ransomware use: Unknown
- CWE: CWE-754

## Description

A Denial of Service vulnerability in the DNS Security feature of Palo Alto Networks PAN-OS software allows an unauthenticated attacker to send a malicious packet through the data plane of the firewall that reboots the firewall. Repeated attempts to trigger this condition will cause the firewall to enter maintenance mode.

## CISA required action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

## Affected vendors and products

- Palo Alto Networks: Cloud NGFW
- Palo Alto Networks: PAN-OS

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2024-3393)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2024-3393)
- [https://security.paloaltonetworks.com/CVE-2024-3393](https://security.paloaltonetworks.com/CVE-2024-3393)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2024-3393 · Markdown: https://rewindex.com/cve/CVE-2024-3393.md · JSON: https://rewindex.com/api/v1/cves/CVE-2024-3393 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:09:40.899Z