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Vulnerability · Published Oct 14, 2026 · Assigned by palo_alto

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

Medium 6.6

In plain English

A medium-severity security flaw in Cloud NGFW from Palo Alto Networks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities).

Severity (CVSS 4.0)6.6Medium
Exploit odds (30 days)0.3%top 74.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

VendorProductVersions
Palo Alto Networks Cloud NGFW see references
Palo Alto Networks PAN-OS 12.2.0 – before 12.2.412.1.0 – before 12.1.10-h211.2.0 – before 11.2.1611.1.0 – before 11.1.16-h310.2.0 – before 10.2.18-h12
Palo Alto Networks Prisma Access 12.1.0 – before 12.1.7-h811.2.0 – before 11.2.7-h2110.2.0 – before 10.2.10-h41

Weakness: CWE-754 · Vector: 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/AU:N/R:U/V:D/RE:M/U:Amber

References