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

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.

8.7 HIGHEPSS 29.12%⚡ Known Exploited (CISA KEV)NVD: Analyzed

Last updated: 2026-06-17 07:44 UTC

OverviewCVSS details

8.7HIGHCVSS 4.0

Score source: palo_alto (CNA)
NVD status: Analyzed
Published: Dec 27, 2024
Assigner: palo_alto

Affected

Cloud NGFW (Palo Alto Networks)

+2 more products →

Exploitation

Public exploit: None listed
CISA KEV: Listed · Dec 30, 2024
KEV due date: Jan 20, 2025
Ransomware use: Unknown
SSVC: Exploitation active · Automatable yes · Impact partial

EPSS · FIRST, scored Nov 7

29.12%chance of exploitation in 30 days

Higher than 98.17% of CVEs

CVSS 4.0 · palo_alto (CNA)

8.7High

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

Attack vector: Network
Attack complexity: Low
Attack requirements: None
Privileges required: None
User interaction: None
Confidentiality impact: None
Integrity impact: None
Availability impact: High
Confidentiality (other systems): None
Integrity (other systems): None
Availability (other systems): Low

CVSS 4.0 · palo_alto (CNA)

7.1High

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

Attack vector: Network
Attack complexity: Low
Attack requirements: None
Privileges required: Low
User interaction: None
Confidentiality impact: None
Integrity impact: None
Availability impact: High
Confidentiality (other systems): None
Integrity (other systems): None
Availability (other systems): Low

CVSS 3.1 · NVD

7.5High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: None
Integrity impact: None
Availability impact: High

NVD status: Analyzed

Overview Affected Products References

NVD CVE.org

Overview

Severity

Score	Severity	Version	Vector String
8.7	HIGH	4.0palo_alto (CNA)	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
7.1	HIGH	4.0palo_alto (CNA)	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:N/R:U/V:C/RE:M/U:Amber
7.5	HIGH	3.1NVD	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA required action

⚡ Known exploited · remediation due Jan 20, 2025

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

Details

CVE ID: CVE-2024-3393
Status: Analyzed
Assigner (CNA): palo_alto
Published: Dec 27, 2024
Last modified: 2026-06-17 07:44 UTC
Weaknesses: CWE-754 · Improper Check for Unusual or Exceptional Conditions

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-08 12:33 UTC.