CVE-2026-0264

PAN-OS: Heap-Based Buffer Overflow in DNS Proxy and DNS Server Allows Unauthenticated Remote Code Execution

State: Published
Severity: 7.2 High
Published: May 13, 2026
Updated: Oct 15, 2026
Reserved: Nov 3, 2025

Description

A buffer overflow vulnerability in the DNS proxy and DNS Server features of Palo Alto Networks PAN-OS® Software allows an unauthenticated attacker with network access to cause a denial of service (DoS) condition (all PAN-OS platforms except Cloud NGFW and Prisma Access) or potentially execute arbitrary code by sending specially crafted network traffic (PA-Series hardware only).

Panorama, Cloud NGFW, and Prisma® Access are not impacted by this vulnerability.

Scores

CVSS	Score	Vector	Source
4.0	7.2 High	CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N/E:U/AU:Y/R:U/V:C/RE:H/U:Red	palo_alto
4.0	6.6 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/AU:Y/R:A/V:D/RE:M/U:Amber	palo_alto

Weaknesses

CWE-122 Heap-based Buffer Overflow

Affected Products

Product	Versions
Cloud NGFWPalo Alto Networks	AllNot affected
PAN-OSPalo Alto Networks	12.1.0 to before 12.1.7, 12.1.4-h5Affectedfrom 12.1.4-h5Not affectedfrom 12.1.7Not affected 11.2.0 to before 11.2.12, 11.2.10-h6, 11.2.7-h13, 11.2.4-h17Affectedfrom 11.2.4-h17Not affectedfrom 11.2.7-h13Not affectedfrom 11.2.10-h6Not affectedfrom 11.2.12Not affected 11.1.0 to before 11.1.15, 11.1.13-h5, 11.1.10-h25, 11.1.7-h6, 11.1.6-h32, 11.1.4-h33Affectedfrom 11.1.4-h33Not affectedfrom 11.1.6-h32Not affectedfrom 11.1.7-h6Not affectedfrom 11.1.10-h25Not affectedfrom 11.1.13-h5Not affectedfrom 11.1.15Not affected 10.2.0 to before 10.2.18-h6, 10.2.16-h7, 10.2.13-h21, 10.2.10-h36, 10.2.7-h34Affectedfrom 10.2.7-h34Not affectedfrom 10.2.10-h36Not affectedfrom 10.2.13-h21Not affectedfrom 10.2.16-h7Not affectedfrom 10.2.18-h6Not affected
Prisma AccessPalo Alto Networks	AllNot affected

References

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