How severe is CVE-2024-3393?

No CVSS score has been assigned to CVE-2024-3393 yet. Review the advisory details and affected package list to assess your exposure.

Which products are affected by CVE-2024-3393?

CVE-2024-3393 affects the following products: paloaltonetworks pan-os.

How do I patch CVE-2024-3393?

No patch has shipped for CVE-2024-3393 yet — track the paloaltonetworks pan-os advisory for a fixed release and apply the workarounds below in the meantime.

How do I detect CVE-2024-3393 across my infrastructure?

Inventory every paloaltonetworks pan-os deployment and check each version against the affected-products list above.

How do I mitigate CVE-2024-3393 if there is no patch (or I can't update yet)?

Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.

Is CVE-2024-3393 actively exploited in the wild?

Yes. There are 2 known exploit references for CVE-2024-3393, including 2 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2024-3393?

CVE-2024-3393 has an EPSS (Exploit Prediction Scoring System) score of 29.1%, placing it in the 98th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score warrants monitoring and prompt remediation.

Is CVE-2024-3393 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2024-3393 (Palo Alto Networks PAN-OS Malicious DNS Packet Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2024-12-30. CISA required all US federal civilian agencies to remediate this vulnerability by 2025-01-20. The required action was: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is CVE-2024-3393?

CVE-2024-3393 is classified as CWE-754 (CWE-754). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

Which products and versions are affected by CVE-2024-3393?

CVE-2024-3393 affects paloaltonetworks pan-os (16 versions, e.g. 10.1, 10.1.14, 10.2…). Check the affected-products list on this page against your deployed version to confirm exposure.

When was CVE-2024-3393 published, and has it been updated?

CVE-2024-3393 was published on December 27, 2024 and was last updated on October 21, 2025. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CISA KEV · ACTIVELY EXPLOITED

CVE-2024-3393 — PAN-OS

CVE-2024-3393 is a CWE-754 vulnerability in paloaltonetworks pan-os. It is in CISA's Known Exploited Vulnerabilities catalog (added 2024-12-30) — treat it as actively exploited and patch now. No vendor fix is recorded yet; mitigation options are listed below.

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…

Published

Dec 27, 2024

Updated

Oct 21, 2025

Affected

1 product

Patched

See advisory

Exploits

2 known

Exploitation data as of Oct 20, 2026 · OSV.dev, NVD, CISA KEV, FIRST.org (EPSS)

Exploitation Status

Actively exploited in the wild

Confirmed by CISA's Known Exploited Vulnerabilities catalog on 2024-12-30. Federal agencies were required to remediate by 2025-01-20.
CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.

Exploitation and automatability from CISA (KEV catalog and SSVC triage) for CVE-2024-3393.

EPSS Exploitation Probability

via FIRST.org ↗

29.1%probability of exploitation in next 30 days

Moderate Risk+0.50%

Lower risk than most CVEs98th percentile — riskier than 98% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

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.

Affected Products

1 product · 112 configurations

pan-ospaloaltonetworks

16 versions

10.110.1.1410.210.2.810.2.910.2.1011.111.1.011.1.111.1.211.1.311.1.4

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

A Denial of Service vulnerability in the DNS Security feature of Palo Al…

cisa.govCISADec 2024

A Denial of Service vulnerability in the DNS Security feature of Palo Al…

github.comGithubJan 2025

Detection & mitigation playbook

Vendor / appliance

Detect
Inventory every paloaltonetworks pan-os deployment and check each version against the affected-products list above.
Remediation status
No patch has shipped for CVE-2024-3393 yet — track the paloaltonetworks pan-os advisory for a fixed release and apply the workarounds below in the meantime.
Mitigate without a patch
Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.

Frequently Asked Questions

O3 Security · Runtime Protection

Is CVE-2024-3393 being exploited in your environment?

Detect and block the exploit chain at execution, on systems you cannot patch yet.

Protect my workloads How runtime protection works