Heap-based buffer overflow in Palo Alto PAN-OS - CVE-2026-0264

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Main Vulnerability Database Vulnerabilities #VU131772

Heap-based buffer overflow in Palo Alto PAN-OS - CVE-2026-0264

Published: May 19, 2026


Vulnerability identifier: #VU131772
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-0264
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Palo Alto Networks, Inc.
Affected software:
Palo Alto PAN-OS

Detailed vulnerability description

The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to heap-based buffer overflow in the DNS proxy and DNS server features when processing specially crafted network traffic. A remote attacker can send specially crafted network traffic to execute arbitrary code.

This impact applies to PA-Series hardware only.


How to mitigate CVE-2026-0264

Install security update from vendor's website.

Sources