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Vulnerabilities

Vulnerability · CVE-2026-0321

CVE-2026-0321 PAN-OS: Denial of Service (DoS) Vulnerabilities in Network Services (Severity: MEDIUM)

Published Oct 14, 2026 · catalog updated Oct 15, 2026 · Palo Alto Networks Cloud NGFW

Check if you run it

No confirmed exploitation is on record for CVE-2026-0321. EPSS is 0.33%. Act only if a listed version of Palo Alto Networks Cloud NGFW is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.6
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.33%
Remediation
Advisory link
Affected products
vendor Palo Alto Networks Cloud NGFW · vendor Palo Alto Networks PAN-OS · vendor Palo Alto Networks Prisma Access

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Palo Alto Networks Cloud NGFWversion unspecified
  • vendor Palo Alto Networks PAN-OSversion unspecified
  • vendor Palo Alto Networks Prisma Accessversion unspecified

How to fix CVE-2026-0321

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-0321. EPSS is 0.33%. Act only if a listed version of Palo Alto Networks Cloud NGFW is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-754. EPSS 0.33%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 14, 2026 · NIST NVD

    Detected

    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 vul

  2. Oct 15, 2026 · NIST NVD

    Updated

    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 vul

  3. Oct 15, 2026 · CIRCL Vulnerability Lookup

    Updated

    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 vul

Sources

  • CIRCL Vulnerability LookupVulnerability recordCVE-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 trigg

    vulnerability.circl.lu
  • CVE.orgVulnerability recordCVE-2026-0321

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-0321

    30-day exploitation probability 0.3%

    first.org
  • NIST NVDVulnerability recordCVE-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 trigg

    nvd.nist.gov
  • Palo Alto NetworksVendor advisoryCVE-2026-0321
    security.paloaltonetworks.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.