Vulnerability Database

383,371

Total vulnerabilities in the database

CVE-2026-0264 — paloaltonetworks / pan-os

Heap-based Buffer Overflow

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.

  • Published: May 13, 2026
  • Updated: Sep 13, 2026
  • CVE: CVE-2026-0264
  • Severity: Critical
  • Exploit:
  • CISA KEV:

CVSS v3:

  • Severity: Critical
  • Score: 9.8
  • AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWEs:

Software Affected versions
paloaltonetworks / pan-os < 10.2.7
paloaltonetworks / pan-os >= 10.2.8, < 10.2.10
paloaltonetworks / pan-os >= 10.2.11, < 10.2.13
paloaltonetworks / pan-os >= 10.2.14, < 10.2.16
paloaltonetworks / pan-os >= 11.1.0, < 11.1.4
paloaltonetworks / pan-os >= 11.1.5, < 11.1.6
paloaltonetworks / pan-os >= 11.1.8, < 11.1.10
paloaltonetworks / pan-os >= 11.1.11, < 11.1.13
paloaltonetworks / pan-os >= 11.2.0, < 11.2.4
paloaltonetworks / pan-os >= 11.2.5, < 11.2.7
paloaltonetworks / pan-os >= 11.2.8, < 11.2.10
paloaltonetworks / pan-os >= 12.1.0, < 12.1.4
paloaltonetworks / pan-os >= 12.1.5, < 12.1.7
paloaltonetworks / pan-os = 10.2.7
paloaltonetworks / pan-os = 10.2.7-h1
paloaltonetworks / pan-os = 10.2.7-h10
paloaltonetworks / pan-os = 10.2.7-h11
paloaltonetworks / pan-os = 10.2.7-h12
paloaltonetworks / pan-os = 10.2.7-h13
paloaltonetworks / pan-os = 10.2.7-h14
paloaltonetworks / pan-os = 10.2.7-h15
paloaltonetworks / pan-os = 10.2.7-h16
paloaltonetworks / pan-os = 10.2.7-h17
paloaltonetworks / pan-os = 10.2.7-h18
paloaltonetworks / pan-os = 10.2.7-h19
paloaltonetworks / pan-os = 10.2.7-h2
paloaltonetworks / pan-os = 10.2.7-h20
paloaltonetworks / pan-os = 10.2.7-h21
paloaltonetworks / pan-os = 10.2.7-h22
paloaltonetworks / pan-os = 10.2.7-h23
paloaltonetworks / pan-os = 10.2.7-h24
paloaltonetworks / pan-os = 10.2.7-h3
paloaltonetworks / pan-os = 10.2.7-h32
paloaltonetworks / pan-os = 10.2.7-h4
paloaltonetworks / pan-os = 10.2.7-h5
paloaltonetworks / pan-os = 10.2.7-h6
paloaltonetworks / pan-os = 10.2.7-h7
paloaltonetworks / pan-os = 10.2.7-h8
paloaltonetworks / pan-os = 10.2.7-h9
paloaltonetworks / pan-os = 10.2.10
paloaltonetworks / pan-os = 10.2.10-h1
paloaltonetworks / pan-os = 10.2.10-h10
paloaltonetworks / pan-os = 10.2.10-h11
paloaltonetworks / pan-os = 10.2.10-h12
paloaltonetworks / pan-os = 10.2.10-h13
paloaltonetworks / pan-os = 10.2.10-h14
paloaltonetworks / pan-os = 10.2.10-h17
paloaltonetworks / pan-os = 10.2.10-h18
paloaltonetworks / pan-os = 10.2.10-h2
paloaltonetworks / pan-os = 10.2.10-h21
paloaltonetworks / pan-os = 10.2.10-h27
paloaltonetworks / pan-os = 10.2.10-h3
paloaltonetworks / pan-os = 10.2.10-h30
paloaltonetworks / pan-os = 10.2.10-h31
paloaltonetworks / pan-os = 10.2.10-h36
paloaltonetworks / pan-os = 10.2.10-h4
paloaltonetworks / pan-os = 10.2.10-h5
paloaltonetworks / pan-os = 10.2.10-h6
paloaltonetworks / pan-os = 10.2.10-h7
paloaltonetworks / pan-os = 10.2.10-h8
paloaltonetworks / pan-os = 10.2.13
paloaltonetworks / pan-os = 10.2.13-h1
paloaltonetworks / pan-os = 10.2.13-h10
paloaltonetworks / pan-os = 10.2.13-h15
paloaltonetworks / pan-os = 10.2.13-h16
paloaltonetworks / pan-os = 10.2.13-h18
paloaltonetworks / pan-os = 10.2.13-h2
paloaltonetworks / pan-os = 10.2.13-h3
paloaltonetworks / pan-os = 10.2.13-h4
paloaltonetworks / pan-os = 10.2.13-h5
paloaltonetworks / pan-os = 10.2.13-h7
paloaltonetworks / pan-os = 10.2.16
paloaltonetworks / pan-os = 10.2.16-h1
paloaltonetworks / pan-os = 10.2.16-h4
paloaltonetworks / pan-os = 10.2.16-h6
paloaltonetworks / pan-os = 10.2.17
paloaltonetworks / pan-os = 10.2.18
paloaltonetworks / pan-os = 10.2.18-h1
paloaltonetworks / pan-os = 10.2.18-h5
paloaltonetworks / pan-os = 11.1.4
paloaltonetworks / pan-os = 11.1.4-h1
paloaltonetworks / pan-os = 11.1.4-h10
paloaltonetworks / pan-os = 11.1.4-h11
paloaltonetworks / pan-os = 11.1.4-h12
paloaltonetworks / pan-os = 11.1.4-h13
paloaltonetworks / pan-os = 11.1.4-h15
paloaltonetworks / pan-os = 11.1.4-h16
paloaltonetworks / pan-os = 11.1.4-h17
paloaltonetworks / pan-os = 11.1.4-h18
paloaltonetworks / pan-os = 11.1.4-h2
paloaltonetworks / pan-os = 11.1.4-h25
paloaltonetworks / pan-os = 11.1.4-h27
paloaltonetworks / pan-os = 11.1.4-h3
paloaltonetworks / pan-os = 11.1.4-h32
paloaltonetworks / pan-os = 11.1.4-h4
paloaltonetworks / pan-os = 11.1.4-h5
paloaltonetworks / pan-os = 11.1.4-h6
paloaltonetworks / pan-os = 11.1.4-h7
paloaltonetworks / pan-os = 11.1.4-h8
paloaltonetworks / pan-os = 11.1.4-h9
paloaltonetworks / pan-os = 11.1.6
paloaltonetworks / pan-os = 11.1.6-h1
paloaltonetworks / pan-os = 11.1.6-h10
paloaltonetworks / pan-os = 11.1.6-h14
paloaltonetworks / pan-os = 11.1.6-h17
paloaltonetworks / pan-os = 11.1.6-h18
paloaltonetworks / pan-os = 11.1.6-h19
paloaltonetworks / pan-os = 11.1.6-h2
paloaltonetworks / pan-os = 11.1.6-h20
paloaltonetworks / pan-os = 11.1.6-h21
paloaltonetworks / pan-os = 11.1.6-h22
paloaltonetworks / pan-os = 11.1.6-h23
paloaltonetworks / pan-os = 11.1.6-h25
paloaltonetworks / pan-os = 11.1.6-h29
paloaltonetworks / pan-os = 11.1.6-h3
paloaltonetworks / pan-os = 11.1.6-h4
paloaltonetworks / pan-os = 11.1.6-h5
paloaltonetworks / pan-os = 11.1.6-h6
paloaltonetworks / pan-os = 11.1.6-h7
paloaltonetworks / pan-os = 11.1.7
paloaltonetworks / pan-os = 11.1.7-h1
paloaltonetworks / pan-os = 11.1.7-h2
paloaltonetworks / pan-os = 11.1.7-h4
paloaltonetworks / pan-os = 11.1.10
paloaltonetworks / pan-os = 11.1.10-h1
paloaltonetworks / pan-os = 11.1.10-h10
paloaltonetworks / pan-os = 11.1.10-h12
paloaltonetworks / pan-os = 11.1.10-h21
paloaltonetworks / pan-os = 11.1.10-h4
paloaltonetworks / pan-os = 11.1.10-h5
paloaltonetworks / pan-os = 11.1.10-h7
paloaltonetworks / pan-os = 11.1.10-h9
paloaltonetworks / pan-os = 11.1.13
paloaltonetworks / pan-os = 11.1.13-h1
paloaltonetworks / pan-os = 11.1.13-h2
paloaltonetworks / pan-os = 11.1.13-h3
paloaltonetworks / pan-os = 11.1.14
paloaltonetworks / pan-os = 11.2.4
paloaltonetworks / pan-os = 11.2.4-h1
paloaltonetworks / pan-os = 11.2.4-h10
paloaltonetworks / pan-os = 11.2.4-h11
paloaltonetworks / pan-os = 11.2.4-h12
paloaltonetworks / pan-os = 11.2.4-h14
paloaltonetworks / pan-os = 11.2.4-h15
paloaltonetworks / pan-os = 11.2.4-h2
paloaltonetworks / pan-os = 11.2.4-h3
paloaltonetworks / pan-os = 11.2.4-h4
paloaltonetworks / pan-os = 11.2.4-h5
paloaltonetworks / pan-os = 11.2.4-h6
paloaltonetworks / pan-os = 11.2.4-h7
paloaltonetworks / pan-os = 11.2.4-h8
paloaltonetworks / pan-os = 11.2.4-h9
paloaltonetworks / pan-os = 11.2.7
paloaltonetworks / pan-os = 11.2.7-h1
paloaltonetworks / pan-os = 11.2.7-h10
paloaltonetworks / pan-os = 11.2.7-h11
paloaltonetworks / pan-os = 11.2.7-h12
paloaltonetworks / pan-os = 11.2.7-h2
paloaltonetworks / pan-os = 11.2.7-h3
paloaltonetworks / pan-os = 11.2.7-h4
paloaltonetworks / pan-os = 11.2.7-h7
paloaltonetworks / pan-os = 11.2.7-h8
paloaltonetworks / pan-os = 11.2.10
paloaltonetworks / pan-os = 11.2.10-h1
paloaltonetworks / pan-os = 11.2.10-h2
paloaltonetworks / pan-os = 11.2.10-h3
paloaltonetworks / pan-os = 11.2.10-h4
paloaltonetworks / pan-os = 11.2.10-h5
paloaltonetworks / pan-os = 11.2.11
paloaltonetworks / pan-os = 12.1.4
paloaltonetworks / pan-os = 12.1.4-h2
paloaltonetworks / pan-os = 12.1.4-h3
palo_alto_networks / pan-os >= 12.1.0, < 12.1.7_12.1.4-h5
palo_alto_networks / pan-os >= 11.2.0, < 11.2.12_11.2.10-h6_11.2.7-h13_11.2.4-h17
palo_alto_networks / pan-os >= 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
palo_alto_networks / pan-os >= 10.2.0, < 10.2.18-h6_10.2.16-h7_10.2.13-h21_10.2.10-h36_10.2.7-h34

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.