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Palo Alto Networks Security AdvisoriesCVE-2026-0310

CVE-2026-0310: PAN-OS: Buffer Overflow Vulnerability via XML Processing

A buffer overflow vulnerability in the XML processing functionality of Palo Alto Networks PAN-OS® software enables an unauthenticated attacker with network access to the management web or dataplane interface to cause a denial of service (DoS) condition on VM-Series firewalls or execute arbitrary code with root privileges on the PA-Series firewalls. Panorama is impacted by this vulnerability.

Read the vendor bulletin Get alerts for Cloud NGFW
9.2CVSS out of 10Critical severity
Scope

What the vendor says is affected

  • Cloud NGFW
  • PAN-OS
  • Prisma Access
  • PAN-OS 12.2
  • PAN-OS 12.1
  • PAN-OS 11.2
  • PAN-OS 11.1
  • PAN-OS 10.2
  • Prisma Access 12.1
  • Prisma Access 11.2
  • Prisma Access 10.2

Versions the vendor lists as fixed

  • Cloud NGFW None on AWS*, None on Azure*
  • PAN-OS 12.2 >= 12.2.3
  • PAN-OS 12.1 >= 12.1.4-h10, >= 12.1.7-h5, >= 12.1.10
  • PAN-OS 11.2 >= 11.2.4-h21, >= 11.2.7-h20, >= 11.2.10-h14, >= 11.2.13-h2
  • PAN-OS 11.1 >= 11.1.4-h36, >= 11.1.6-h38, >= 11.1.7-h10, >= 11.1.10-h33, >= 11.1.13-h12, >= 11.1.16-h2
  • PAN-OS 10.2 >= 10.2.7-h37, >= 10.2.10-h40, >= 10.2.13-h24, >= 10.2.16-h10, >= 10.2.18-h10
  • Prisma Access 12.1 >= 12.1.7-h5*
  • Prisma Access 11.2 >= 11.2.7-h20*
  • Prisma Access 10.2 >= 10.2.10-h40*
Next step

What the vendor recommends

VERSION MINOR VERSION SUGGESTED SOLUTION Cloud NGFW Customers who prefer to upgrade can work with Palo Alto Networks support to schedule an on-demand software upgrade. PAN-OS 12.2 12.2.0 through 12.2.2 Upgrade to 12.2.3 or later. PAN-OS 12.1 12.1.8 through 12.1.9 Upgrade to 12.1.10 or later. 12.1.5 through 12.1.7-h* Upgrade to 12.1.7-h5 or 12.1.10 or later. 12.1.2 through 12.1.4-h* Upgrade to 12.1.4-h10 or 12.1.10 or later. PAN-OS 11.2 11.2.11 through 11.2.13-h* Upgrade to 11.2.13-h2 or later. 11.2.8 through 11.2.10-h* Upgrade to 11.2.10-h14 or later. 11.2.5 through 11.2.7-h* Upgrade to 11.2.7-h20 or later. 11.2.0 through 11.2.4-h* Upgrade to 11.2.4-h21 or later. PAN-OS 11.1 11.1.14 through 11.1.16-h* Upgrade to 11.1.16-h2 or later. 11.1.11 through 11.1.13-h* Upgrade to 11.1.13-h12 or later. 11.1.8 through 11.1.10-h* Upgrade to 11.1.10-h33 or later. 11.1.7 through 11.1.7-h* Upgrade to 11.1.7-h10 or later. 11.1.5 through 11.1.6-h* Upgrade to 11.1.6-h38 or later. 11.1.0 through 11.1.4-h* Upgrade to 11.1.4-h36 or later. PAN-OS 10.2 10.2.17 through Upgrade to 10.2.18-h10 or later. 10.2.18-h* 10.2.14 through 10.2.16-h* Upgrade to 10.2.16-h10 or later. 10.2.11 through 10.2.13-h* Upgrade to 10.2.13-h24 or later. 10.2.8 through 10.2.10-h* Upgrade to 10.2.10-h40 or later. 10.2.0 through 10.2.7-h* Upgrade to 10.2.7-h37 or later. All older Upgrade to a supported fixed version. unsupported PAN-OS versions Prisma Access 12.1 12.1.2 through 12.1.* Upgrade to 12.1.7-h5 or later. Prisma Access 11.2 11.2.0 through 11.2* Upgrade to 11.2.7-h20 or later. Prisma Access 10.2 10.2.0 through 10.2.* Upgrade to 10.2.10-h40 or later. * See the note under Product Status for information regarding Prisma Access and Cloud NGFW upgrades.

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Update history

What changed in later vendor updates

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    • The vendor changed the advisory summary.
    • The vendor changed its remediation guidance.
Timeline

When this advisory changed

  1. Published by Palo Alto Networks

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

  3. Confirmed at the source

    Our collector saw this advisory during a later source check.

Vulnerabilities

CVEs named in this advisory

CVE-2026-0310View CVSS, KEV, EPSS, and threat context
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