CVE-2024-3393

CVE-2024-3393 is a high-severity vulnerability in Paloaltonetworks Pan-os with a CVSS 3.x base score of 7.5. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2024-12-30). The underlying weakness is classified as CWE-754.

Key facts

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.

Frequently asked questions

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.
How severe is CVE-2024-3393?
CVE-2024-3393 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2024-3393 being actively exploited?
Yes. CVE-2024-3393 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2024-12-30, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2024-3393?
CVE-2024-3393 primarily affects Paloaltonetworks Pan-os. In total, 59 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-3393?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2024-3393 have an EU (EUVD) identifier?
Yes. CVE-2024-3393 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-31982. It is also flagged as exploited in the EUVD (since 2024-12-30).
When was CVE-2024-3393 published?
CVE-2024-3393 was published on 2024-12-27 and last updated on 2026-06-17.

References

Affected products (59)

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