CISA-confirmed known exploited vulnerability

CVE-2024-3393

Palo Alto Networks PAN-OS Malicious DNS Packet Vulnerability

Palo Alto Networks · PAN-OS

Vulnerability details

Palo Alto Networks PAN-OS contains a vulnerability in parsing and logging malicious DNS packets in the DNS Security feature that, when exploited, allows an unauthenticated attacker to remotely reboot the firewall. Repeated attempts to trigger this condition will cause the firewall to enter maintenance mode.

Added to CISA KEV: 2024-12-30

Ransomware campaign use: Unknown

CISA due date: 2025-01-20

Defensive guidance from CISA

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

This is the source's required-action field, not an independently validated patch procedure. Refer to the vendor for exact affected versions and fixes.

Source catalog date: 2026-11-06T19:44:45.1797Z · Last retrieved: 2026-11-06 21:02:26 UTC

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