PAN-OS: Denial of Service (DoS) Vulnerabilities in Network Services
Summary
| CVE | CVE-2026-0321 |
|---|---|
| State | PUBLISHED |
| Assigner | palo_alto |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-14 20:17:26 UTC |
| Updated | 2026-10-15 20:17:04 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v4.0 6.6 MEDIUM from [email protected]
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:U/V:D/RE:M/U:Amber
EPSS: 0.003260000 probability, percentile 0.240490000 (date 2026-10-15)
Problem Types: CWE-754 | CWE-754 CWE-754 Improper Check for Unusual or Exceptional Conditions
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 6.6 | MEDIUM | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/C... |
| 4.0 | CNA | CVSS | 6.6 | MEDIUM | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/A... |
CVSS v4.0 Breakdown
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:U/V:D/RE:M/U:Amber
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Palo Alto Networks | Cloud NGFW | unaffected All custom | Not specified |
| CNA | Palo Alto Networks | PAN-OS | affected 12.2.0 12.2.4 custom | Not specified |
| CNA | Palo Alto Networks | PAN-OS | affected 12.1.0 12.1.10-h2 custom | Not specified |
| CNA | Palo Alto Networks | PAN-OS | affected 11.2.0 11.2.16 custom | Not specified |
| CNA | Palo Alto Networks | PAN-OS | affected 11.1.0 11.1.16-h3 custom | Not specified |
| CNA | Palo Alto Networks | PAN-OS | affected 10.2.0 10.2.18-h12 custom | Not specified |
| CNA | Palo Alto Networks | Prisma Access | affected 12.1.0 12.1.7-h8 custom | Not specified |
| CNA | Palo Alto Networks | Prisma Access | affected 11.2.0 11.2.7-h21 custom | Not specified |
| CNA | Palo Alto Networks | Prisma Access | affected 10.2.0 10.2.10-h41 custom | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| security.paloaltonetworks.com/CVE-2026-0321 | [email protected] | security.paloaltonetworks.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Ben Nott (internal reporter) (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-10-14T16:00:00.000Z | Initial Publication |
Solutions
CNA: Version Minor Version Suggested Solution 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. Prisma Access needs to be upgraded in accordance with product status table.
Workarounds
CNA: No known workarounds exist for this issue. Customers with a Threat Prevention subscription are provided with limited coverage against this vulnerability by enabling Threat ID 510038 (from Applications and Threats content version 9158-10284 and later). Please note that this Threat ID requires SSL Decryption.
Exploits
CNA: Palo Alto Networks is not aware of any malicious exploitation of this issue.