Vulnerability Database

327,594

Total vulnerabilities in the database

CVE-2026-0227

A vulnerability in Palo Alto Networks PAN-OS software enables an unauthenticated attacker to cause a denial of service (DoS) to the firewall. Repeated attempts to trigger this issue results in the firewall entering into maintenance mode.

  • Published: Jan 15, 2026
  • Updated: Jan 24, 2026
  • CVE: CVE-2026-0227
  • Severity: High
  • Exploit:

CVSS v3:

  • Severity: High
  • Score: 7.5
  • AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWEs:

Software From Fixed in
paloaltonetworks / pan-os 10.1.14 10.1.14.x
paloaltonetworks / pan-os 10.1.14-h10 10.1.14-h10.x
paloaltonetworks / pan-os 10.1.14-h11 10.1.14-h11.x
paloaltonetworks / pan-os 10.1.14-h13 10.1.14-h13.x
paloaltonetworks / pan-os 10.1.14-h14 10.1.14-h14.x
paloaltonetworks / pan-os 10.1.14-h15 10.1.14-h15.x
paloaltonetworks / pan-os 10.1.14-h16 10.1.14-h16.x
paloaltonetworks / pan-os 10.1.14-h19 10.1.14-h19.x
paloaltonetworks / pan-os 10.1.14-h2 10.1.14-h2.x
paloaltonetworks / pan-os 10.1.14-h4 10.1.14-h4.x
paloaltonetworks / pan-os 10.1.14-h6 10.1.14-h6.x
paloaltonetworks / pan-os 10.1.14-h8 10.1.14-h8.x
paloaltonetworks / pan-os 10.1.14-h9 10.1.14-h9.x
paloaltonetworks / pan-os 10.2.7 10.2.7.x
paloaltonetworks / pan-os 10.2.7-h1 10.2.7-h1.x
paloaltonetworks / pan-os 10.2.7-h12 10.2.7-h12.x
paloaltonetworks / pan-os 10.2.7-h16 10.2.7-h16.x
paloaltonetworks / pan-os 10.2.7-h18 10.2.7-h18.x
paloaltonetworks / pan-os 10.2.7-h19 10.2.7-h19.x
paloaltonetworks / pan-os 10.2.7-h21 10.2.7-h21.x
paloaltonetworks / pan-os 10.2.7-h24 10.2.7-h24.x
paloaltonetworks / pan-os 10.2.7-h3 10.2.7-h3.x
paloaltonetworks / pan-os 10.2.7-h6 10.2.7-h6.x
paloaltonetworks / pan-os 10.2.7-h8 10.2.7-h8.x
paloaltonetworks / pan-os 10.2.10 10.2.10.x
paloaltonetworks / pan-os 10.2.10-h10 10.2.10-h10.x
paloaltonetworks / pan-os 10.2.10-h12 10.2.10-h12.x
paloaltonetworks / pan-os 10.2.10-h14 10.2.10-h14.x
paloaltonetworks / pan-os 10.2.10-h17 10.2.10-h17.x
paloaltonetworks / pan-os 10.2.10-h18 10.2.10-h18.x
paloaltonetworks / pan-os 10.2.10-h2 10.2.10-h2.x
paloaltonetworks / pan-os 10.2.10-h21 10.2.10-h21.x
paloaltonetworks / pan-os 10.2.10-h27 10.2.10-h27.x
paloaltonetworks / pan-os 10.2.10-h3 10.2.10-h3.x
paloaltonetworks / pan-os 10.2.10-h4 10.2.10-h4.x
paloaltonetworks / pan-os 10.2.10-h5 10.2.10-h5.x
paloaltonetworks / pan-os 10.2.10-h7 10.2.10-h7.x
paloaltonetworks / pan-os 10.2.10-h9 10.2.10-h9.x
paloaltonetworks / pan-os 10.2.13 10.2.13.x
paloaltonetworks / pan-os 10.2.13-h1 10.2.13-h1.x
paloaltonetworks / pan-os 10.2.13-h10 10.2.13-h10.x
paloaltonetworks / pan-os 10.2.13-h16 10.2.13-h16.x
paloaltonetworks / pan-os 10.2.13-h2 10.2.13-h2.x
paloaltonetworks / pan-os 10.2.13-h3 10.2.13-h3.x
paloaltonetworks / pan-os 10.2.13-h4 10.2.13-h4.x
paloaltonetworks / pan-os 10.2.13-h5 10.2.13-h5.x
paloaltonetworks / pan-os 10.2.13-h7 10.2.13-h7.x
paloaltonetworks / pan-os 10.2.16 10.2.16.x
paloaltonetworks / pan-os 10.2.16-h1 10.2.16-h1.x
paloaltonetworks / pan-os 10.2.16-h4 10.2.16-h4.x
paloaltonetworks / pan-os 10.2.17 10.2.17.x
paloaltonetworks / pan-os 10.2.18 10.2.18.x
paloaltonetworks / pan-os 11.1.4 11.1.4.x
paloaltonetworks / pan-os 11.1.4-h1 11.1.4-h1.x
paloaltonetworks / pan-os 11.1.4-h13 11.1.4-h13.x
paloaltonetworks / pan-os 11.1.4-h15 11.1.4-h15.x
paloaltonetworks / pan-os 11.1.4-h17 11.1.4-h17.x
paloaltonetworks / pan-os 11.1.4-h18 11.1.4-h18.x
paloaltonetworks / pan-os 11.1.4-h25 11.1.4-h25.x
paloaltonetworks / pan-os 11.1.4-h4 11.1.4-h4.x
paloaltonetworks / pan-os 11.1.4-h7 11.1.4-h7.x
paloaltonetworks / pan-os 11.1.4-h9 11.1.4-h9.x
paloaltonetworks / pan-os 11.1.6 11.1.6.x
paloaltonetworks / pan-os 11.1.6-h1 11.1.6-h1.x
paloaltonetworks / pan-os 11.1.6-h10 11.1.6-h10.x
paloaltonetworks / pan-os 11.1.6-h14 11.1.6-h14.x
paloaltonetworks / pan-os 11.1.6-h17 11.1.6-h17.x
paloaltonetworks / pan-os 11.1.6-h19 11.1.6-h19.x
paloaltonetworks / pan-os 11.1.6-h20 11.1.6-h20.x
paloaltonetworks / pan-os 11.1.6-h21 11.1.6-h21.x
paloaltonetworks / pan-os 11.1.6-h22 11.1.6-h22.x
paloaltonetworks / pan-os 11.1.6-h3 11.1.6-h3.x
paloaltonetworks / pan-os 11.1.6-h4 11.1.6-h4.x
paloaltonetworks / pan-os 11.1.6-h6 11.1.6-h6.x
paloaltonetworks / pan-os 11.1.6-h7 11.1.6-h7.x
paloaltonetworks / pan-os 11.1.10 11.1.10.x
paloaltonetworks / pan-os 11.1.10-h1 11.1.10-h1.x
paloaltonetworks / pan-os 11.1.10-h4 11.1.10-h4.x
paloaltonetworks / pan-os 11.1.10-h5 11.1.10-h5.x
paloaltonetworks / pan-os 11.1.10-h7 11.1.10-h7.x
paloaltonetworks / pan-os 11.2.4 11.2.4.x
paloaltonetworks / pan-os 11.2.4-h1 11.2.4-h1.x
paloaltonetworks / pan-os 11.2.4-h10 11.2.4-h10.x
paloaltonetworks / pan-os 11.2.4-h11 11.2.4-h11.x
paloaltonetworks / pan-os 11.2.4-h12 11.2.4-h12.x
paloaltonetworks / pan-os 11.2.4-h2 11.2.4-h2.x
paloaltonetworks / pan-os 11.2.4-h4 11.2.4-h4.x
paloaltonetworks / pan-os 11.2.4-h5 11.2.4-h5.x
paloaltonetworks / pan-os 11.2.4-h6 11.2.4-h6.x
paloaltonetworks / pan-os 11.2.4-h7 11.2.4-h7.x
paloaltonetworks / pan-os 11.2.4-h8 11.2.4-h8.x
paloaltonetworks / pan-os 11.2.4-h9 11.2.4-h9.x
paloaltonetworks / pan-os 11.2.7 11.2.7.x
paloaltonetworks / pan-os 11.2.7-h1 11.2.7-h1.x
paloaltonetworks / pan-os 11.2.7-h2 11.2.7-h2.x
paloaltonetworks / pan-os 11.2.7-h3 11.2.7-h3.x
paloaltonetworks / pan-os 11.2.7-h4 11.2.7-h4.x
paloaltonetworks / pan-os 11.2.7-h7 11.2.7-h7.x
paloaltonetworks / pan-os 11.2.10 11.2.10.x
paloaltonetworks / pan-os 11.2.10-h1 11.2.10-h1.x
paloaltonetworks / pan-os 12.1.2 12.1.2.x
paloaltonetworks / pan-os 12.1.3 12.1.3.x
paloaltonetworks / pan-os 12.1.3-h1 12.1.3-h1.x
paloaltonetworks / pan-os 10.1.0 10.1.14
paloaltonetworks / pan-os 10.2.0 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 11.1.7 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 11.1.4-h16 11.1.4-h16.x
paloaltonetworks / pan-os 11.1.6-h5 11.1.6-h5.x
paloaltonetworks / pan-os 11.2.4-h14 11.2.4-h14.x

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.