Threat Intelligence / CVE / CVE-2024-3393

CVE-2024-3393 — Paloaltonetworks Pan-os

CISA KEV

CVSS v3.1 7.5 (HIGH) · CVSS v4.0 8.7 · EPSS 77.6% (higher than 98.9% of all scored CVEs) · Priority 9/10 · Published 2024-12-27

As of 2025-11-04, CVE-2024-3393 is a HIGH-severity vulnerability in Paloaltonetworks Pan-os, CVSS v3.1 7.5, EPSS 77.6% (98.9th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2024-12-30), with a US federal remediation deadline of 2025-01-20. Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2024-3393, most recently “CVE-2024-3393 PAN-OS DNS Security DoS — Unauthenticated Firewall Crash Forces Maintenance Mode, Perimeter Security Collapse”.

Last updated: 2025-11-04

What is CVE-2024-3393?

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.

The record classifies CVE-2024-3393 under weakness class CWE-754. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on availability. 60 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 625 days ago.

Severity and exploitation probability

CVSS v3.1 base score: 7.5 — HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0 base score: 8.7
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:U/V:C/RE:M/U:Amber
EPSS (FIRST): 77.6% probability of exploitation in the next 30 days, higher than 98.9% of all scored CVEs
CISA KEV: Listed since 2024-12-30, federal remediation deadline 2025-01-20
Threadlinqs priority: 9/10 — CISA KEV-listed, which Threadlinqs floors at 9
Published: 2024-12-27, last modified 2025-11-04

Is CVE-2024-3393 being exploited?

CISA added CVE-2024-3393 to the Known Exploited Vulnerabilities catalog on 2024-12-30, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2025-01-20 under BOD 22-01. It currently carries a trending score of 40 in the Threadlinqs vulnerability feed.

Affected products and versions

Paloaltonetworks: Pan-os, Pan-os 10.1.14, Pan-os 10.2.8, Pan-os 10.2.9, Pan-os 10.2.10, Pan-os 10.2.11, Pan-os 10.2.12, Pan-os 10.2.13, Pan-os 11.1.2, Pan-os 11.1.3, Pan-os 11.1.4, Prisma Access

Showing 12 of 60 recorded product entries.

How to fix CVE-2024-3393

Vendor advisory: https://security.paloaltonetworks.com/CVE-2024-3393. Because CVE-2024-3393 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2025-01-20. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

Threat activity tracking CVE-2024-3393

1 tracked threat in the Threadlinqs corpus references CVE-2024-3393, either in the campaign’s CVE list or as an indicator on the campaign record.

CVE-2024-3393 PAN-OS DNS Security DoS — Unauthenticated Firewall Crash Forces Maintenance Mode, Perimeter Security Collapse — HIGH · 2026-02-16

Sources

Seeded from nvd and not yet processed by the Threadlinqs enrichment pipeline, so blank CVSS, EPSS or KEV fields above mean NOT MEASURED rather than measured-absent.

Full detection coverage & IOCs for threats exploiting CVE-2024-3393 are available via the Threadlinqs MCP server (Purple tier). View plans →

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