CVE-2026-0264: PAN-OS: Heap-Based Buffer Overflow in DNS Proxy and DNS Server Allows Unauthenticated Remote Code Execution

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-13 · updated 2026-10-26
Weakness: CWE-122

Description

A buffer overflow vulnerability in the DNS proxy and DNS Server features of Palo Alto Networks PAN-OS® Software allows an unauthenticated attacker with network access to cause a denial of service (DoS) condition (all PAN-OS platforms except Cloud NGFW and Prisma Access) or potentially execute arbitrary code by sending specially crafted network traffic (PA-Series hardware only). Panorama, Cloud NGFW, and Prisma® Access are not impacted by this vulnerability.

Affected products

Palo Alto Networks PAN-OS: before 10.2.7; from 10.2.8 before 10.2.10; from 10.2.11 before 10.2.13; from 10.2.14 before 10.2.16; from 11.1.0 before 11.1.4; from 11.1.5 before 11.1.6 — fixed in 10.2.7, 10.2.10, 10.2.13, 10.2.16, 11.1.4, 11.1.6
Siemens Ruggedcom Ape1808 Firmware: all versions

How to fix

Upgrade to a fixed version: Palo Alto Networks PAN-OS 10.2.7, 10.2.10, 10.2.13, 10.2.16. Check the vendor advisory for mitigations.

References

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