CVE-2026-0321

MEDIUMCVSS 6.6/10

Last modified

CVE-2026-0321 is a medium-severity vulnerability rated 6.6/10 on the CVSS scale. 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..

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.

Metrics

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
Palo Alto NetworksPAN-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
Palo Alto NetworksPrisma Access>= 12.1.0, < 12.1.7-h8; >= 11.2.0, < 11.2.7-h21; >= 10.2.0, < 10.2.10-h41

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

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.
How severe is CVE-2026-0321?
CVE-2026-0321 has a CVSS score of 6.6/10 (MEDIUM severity).
How do I fix CVE-2026-0321?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST