CVE-2024-3393 HIGH

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

Vendor Palo Alto Networks
Product PAN-OS
Weakness CWE-754
KEV Status Known Exploited
Published December 27, 2024
Last update October 21, 2025
View on NVD All CVEs

CVSS base score

8.7/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:N/R:U/V:C/RE:M/U:Amber

What the vulnerability does

01Description

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 mandated remediation

02CISA Required Action

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

Key dates

03Disclosure timeline

December 27, 2024 CVE published
October 21, 2025 Record updated