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CVE-2026-0264— PAN-OS: Heap-Based Buffer Overflow in DNS Proxy and DNS Server Allows Unauthenticated Remote Code Execution

Quick assessment

Affected

Palo Alto Networks Cloud NGFW

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Palo Alto Networks PAN-OS是美国Palo Alto Networks公司的一套为其防火墙设备开发的操作系统。 Palo Alto Networks PAN-OS存在安全漏洞，该漏洞源于DNS代理和DNS服务器功能中的缓冲区溢出，可能导致未经身份验证的攻击者通过网络访问发送特制网络流量造成拒绝服务或执行任意代码。以下产品及版本受到影响：除Cloud NGFW和Prisma Access外的所有PAN-OS平台。

CVSS 6.6 · Medium EPSS 0.47% · P41 Updated Oct 15, 2026

Possible ATT&CK Techniques 3 AI

T1068 · Exploitation for Privilege Escalation T1190 · Exploit Public-Facing Application T1203 · Exploitation for Client Execution

Affected Version Matrix 6

Vendor	Product	Version Range	Status
Palo Alto Networks	Cloud NGFW	`All`	unaffected
Palo Alto Networks	PAN-OS	`12.1.0< 12.1.7, 12.1.4-h5`	affected
		`11.2.0< 11.2.12, 11.2.10-h6, 11.2.7-h13, 11.2.4-h17`	affected
		`11.1.0< 11.1.15, 11.1.13-h5, 11.1.10-h25, 11.1.7-h6, 11.1.6-h32, 11.1.4-h33`	affected
		`10.2.0< 10.2.18-h6, 10.2.16-h7, 10.2.13-h21, 10.2.10-h36, 10.2.7-h34`	affected
Palo Alto Networks	Prisma Access	`All`	unaffected

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I. Basic Information for CVE-2026-0264

Vulnerability Information

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Vulnerability Title

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

Source: CVE Program / CVE List V5

Vulnerability 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.

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

堆缓冲区溢出

Source: CVE Program / CVE List V5

Vulnerability Title

Palo Alto Networks PAN-OS 安全漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

Source: CNNVD (China National Vulnerability Database)

CVSS Information

N/A

Source: CNNVD (China National Vulnerability Database)

Vulnerability Type

N/A

Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor	Product	Affected Versions	CPE
Palo Alto Networks	Cloud NGFW	-	-
Palo Alto Networks	PAN-OS	12.1.0 ~ 12.1.7, 12.1.4-h5	`cpe:2.3:o:palo_alto_networks:pan-os:12.1.6:::::::*`
Palo Alto Networks	Prisma Access	-	-

II. Public POCs for CVE-2026-0264

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-0264

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Vendor Advisories for CVE-2026-0264 (1)

CVE-2026-0264 PAN-OS: Heap-Based Buffer Overflow in DNS Proxy and DNS Server Allows Unauthenticated Remote Code Execution vendor-advisory

https://www.cve.org/CVERecord?id=CVE-2026-0264

Same Patch Batch · Palo Alto Networks · 2026-05-13 · 26 CVEs total

CVE-2026-0257	7.8 HIGH	PAN-OS: GlobalProtect Authentication Bypass Vulnerabilities
CVE-2026-0262	6.6 MEDIUM	PAN-OS: Denial of Service Vulnerabilities in Network Traffic Parsing
CVE-2026-0261	5.7 MEDIUM	PAN-OS: Authenticated Admin Command Injection Vulnerability
CVE-2026-0258	4.8 MEDIUM	PAN-OS: Server-Side Request Forgery (SSRF) in IKEv2 Certificate URL Fetching
CVE-2026-0256	4.4 MEDIUM	PAN-OS: Stored Cross-Site Scripting (XSS) Vulnerability in the Web Interface
CVE-2026-0265	2.7 LOW	PAN-OS: Authentication Bypass with Cloud Authentication Service (CAS) enabled
CVE-2026-0242		Trust Protection Foundation: SQL Injection Vulnerability
CVE-2026-0250		GlobalProtect App: Buffer Overflow Vulnerability during connection to Portal or Gateway
CVE-2026-0245		Prisma Access Agent: Information Disclosure Vulnerabilities
CVE-2026-0259		WildFire WF-500 and WF-500-B: Arbitrary File Read and Delete Vulnerability in WildFire App
CVE-2026-0236		Prisma Browser: Code Injection Enables Security Controls Bypass
CVE-2026-0241		Trust Protection Foundation: Multiple Authorization Bypass Vulnerabilities
CVE-2026-0243		Prisma SD-WAN: Denial of Service (DoS) Vulnerability Through IPv6 Crafted Packet
CVE-2026-0237		Prisma Browser: Improperly Restricted Automation Bridge Allows Security Bypass
CVE-2026-0247		Prisma Access Agent Endpoint DLP: Authorization Bypass Vulnerabilities
CVE-2026-0238		Broker VM: Improper Input Validation in Broker VM Certificate and Key Fields
CVE-2026-0235		Prisma Browser: Access and Data Rule Bypass
CVE-2026-0251		GlobalProtect App: Local Privilege Escalation Vulnerabilities
CVE-2026-0249		GlobalProtect App: Certificate Validation Bypass Vulnerabilities
CVE-2026-0240		Trust Protection Foundation: Sensitive Information Disclosure Vulnerability

Showing top 20 of 26 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Cloud NGFW

Same vendor: Palo Alto Networks

Same weakness: CWE-122