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
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Palo Alto Networks | Cloud NGFW | — | All |
| Palo Alto Networks | PAN-OS | 12.2.0 – < 12.2.4, 12.1.0 – < 12.1.10-h2, 11.2.0 – < 11.2.16, 11.1.0 – < 11.1.16-h3, 10.2.0 – < 10.2.18-h12 | 12.2.4 |
| Palo Alto Networks | Prisma Access | 12.1.0 – < 12.1.7-h8, 11.2.0 – < 11.2.7-h21, 10.2.0 – < 10.2.10-h41 | 12.1.7-h8 |
Advisories 2
- SSA-104023 SSA-104023: Multiple Vulnerabilities in Palo Alto Networks PAN-OS on RUGGEDCOM APE1808 Devices Siemens ProductCERT · Nov 10, 2026
- WID-SEC-2026-3947 Palo Alto Networks PAN-OS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 14, 2026
References
- https://security.paloaltonetworks.com/CVE-2026-0321 vendor-advisory