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CVE intelligence

CVE-2026-0321

Vulnerability intelligence

Published Oct 14, 2026Sources checked Oct 21, 2026
6.6MEDIUMCVSS out of 10
What this means

Review the available evidence

CVE-2026-0321 and is rated Medium severity with a CVSS score of 6.6. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

Palo Alto Networks Security Advisories guidance

Vendor revision: Oct 15, 2026
Vendor remediation details

VERSION MINOR VERSION SUGGESTED SOLUTION Cloud NGFW No action needed. PAN-OS 12.2 12.2.0 through 12.2.3 Upgrade to 12.2.4 or later. PAN-OS 12.1 12.1.8 through 12.1.10-h* Upgrade to 12.1.10-h2 or later. 12.1.5 through 12.1.7-h* Upgrade to 12.1.7-h8 or 12.1.10-h2 or later. 12.1.2 through 12.1.4-h* Upgrade to 12.1.4-h12 or 12.1.10-h2 or later. PAN-OS 11.2 11.2.14 through 11.2.15-h* Upgrade to 11.2.16 or later. 11.2.11 through 11.2.13-h* Upgrade to 11.2.13-h3 or 11.2.16 or later. 11.2.8 through 11.2.10-h* Upgrade to 11.2.10-h15 or 11.2.16 or later. 11.2.5 through 11.2.7-h* Upgrade to 11.2.7-h21 or 11.2.16 or later. 11.2.0 through 11.2.4-h* Upgrade to 11.2.4-h22 or 11.2.16 or later. PAN-OS 11.1 11.1.14 through 11.1.16-h* Upgrade to 11.1.16-h3 or later. 11.1.11 through 11.1.13-h* Upgrade to 11.1.13-h15 or 11.1.16-h3 or later. 11.1.8 through 11.1.10-h* Upgrade to 11.1.10-h35 or 11.1.16-h3 or later. 11.1.7 through 11.1.7-h* Upgrade to 11.1.7-h11 or 11.1.16-h3 or later. 11.1.5 through 11.1.6-h* Upgrade to 11.1.6-h39 or 11.1.16-h3 or later. 11.1.0 through 11.1.4-h* Upgrade to 11.1.4-h37 or 11.1.16-h3 or later. PAN-OS 10.2 10.2.17 through 10.2.18-h* Upgrade to 10.2.18-h12 or later. 10.2.14 through 10.2.16-h* Upgrade to 10.2.16-h11 or 10.2.18-h12 or later. 10.2.11 through 10.2.13-h* Upgrade to 10.2.13-h26 or 10.2.18-h12 or later. 10.2.8 through 10.2.10-h* Upgrade to 10.2.10-h41 or 10.2.18-h12 or later. 10.2.0 through 10.2.7-h* Upgrade to 10.2.7-h38 or 10.2.18-h12 or later. All older Upgrade to a supported fixed version. unsupported PAN-OS versions Prisma Access 12.1 12.1.0 through 12.1.* Upgrade to 12.1.7-h8 or later. Prisma Access 11.2 11.2.0 through 11.2.* Upgrade to 11.2.7-h21 or later. Prisma Access 10.2 10.2.0 through 10.2.* Upgrade to 10.2.10-h41 or later. * See the note under Product Status for information regarding Prisma Access upgrades.

Vendor-listed releases

  • Cloud NGFW All
  • PAN-OS 12.2 >= 12.2.4
  • PAN-OS 12.1 >= 12.1.4-h12, >= 12.1.7-h8, >= 12.1.10-h2
  • PAN-OS 11.2 >= 11.2.4-h22, >= 11.2.7-h21, >= 11.2.10-h15, >= 11.2.13-h3, >= 11.2.16
  • PAN-OS 11.1 >= 11.1.4-h37, >= 11.1.6-h39, >= 11.1.7-h11, >= 11.1.10-h35, >= 11.1.13-h15, >= 11.1.16-h3
  • PAN-OS 10.2 >= 10.2.7-h38, >= 10.2.10-h41, >= 10.2.13-h26, >= 10.2.16-h11, >= 10.2.18-h12
  • Prisma Access 12.1 >= 12.1.7-h8*
  • Prisma Access 11.2 >= 11.2.7-h21*
  • Prisma Access 10.2 >= 10.2.10-h41*
CISA KEVNot listedBased on the latest collected catalog
EPSS0.3%Estimated 30-day exploitation probability
Ransomware useNot markedCISA KEV ransomware field
Threat actors0Source-linked actor relationships
Overview

What is CVE-2026-0321?

Denial of service vulnerabilities in Palo Alto Networks PAN-OS® software allow an unauthenticated attacker with network access to cause a denial of service (DoS) condition by sending specially crafted network traffic to or through a dataplane interface. Repeated attempts to trigger this condition result in the firewall entering maintenance mode.

Cloud NGFW and Panorama are not affected by this vulnerability.

Source: NVD