CVE-2026-0264: CWE-122 Heap-based Buffer Overflow in Palo Alto Networks Cloud NGFW
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.
AI Analysis
Technical Summary
This vulnerability involves a heap-based buffer overflow in the DNS proxy and DNS Server components of Palo Alto Networks PAN-OS software. It allows an unauthenticated remote attacker to cause denial of service on all PAN-OS platforms except Cloud NGFW, Prisma Access, and Panorama. On PA-Series hardware, the vulnerability may also allow arbitrary code execution. Cloud NGFW and Prisma Access are explicitly not affected. No patch or remediation level has been specified in the available data.
Potential Impact
The vulnerability can lead to denial of service conditions on most PAN-OS platforms, disrupting network security operations. On PA-Series hardware, it may allow remote code execution, which could lead to full system compromise. Cloud NGFW and Prisma Access are not impacted, so their security posture is unaffected by this issue.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or workaround is provided in the available data, users should monitor Palo Alto Networks advisories for updates. Cloud NGFW and Prisma Access customers are not affected and do not require action for this vulnerability.
CVE-2026-0264: CWE-122 Heap-based Buffer Overflow in Palo Alto Networks Cloud NGFW
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.
CVSS v4.0
Score 7.2high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a heap-based buffer overflow in the DNS proxy and DNS Server components of Palo Alto Networks PAN-OS software. It allows an unauthenticated remote attacker to cause denial of service on all PAN-OS platforms except Cloud NGFW, Prisma Access, and Panorama. On PA-Series hardware, the vulnerability may also allow arbitrary code execution. Cloud NGFW and Prisma Access are explicitly not affected. No patch or remediation level has been specified in the available data.
Potential Impact
The vulnerability can lead to denial of service conditions on most PAN-OS platforms, disrupting network security operations. On PA-Series hardware, it may allow remote code execution, which could lead to full system compromise. Cloud NGFW and Prisma Access are not impacted, so their security posture is unaffected by this issue.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or workaround is provided in the available data, users should monitor Palo Alto Networks advisories for updates. Cloud NGFW and Prisma Access customers are not affected and do not require action for this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- palo_alto
- Date Reserved
- 2025-11-03T20:44:24.711Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a04ba1fcbff5d8610f4824a
Added to database: 05/13/2026, 17:51:27 UTC
Last enriched: 07/15/2026, 11:21:24 UTC
Last updated: 07/31/2026, 19:22:57 UTC
Views: 146
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