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

Critical severity · published May 13, 2026

CVE-2026-0264

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

9.8

CVSS

0.5%

EPSS

On KEV

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

None

Confidentiality

High

Integrity

High

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.5% · higher than 41% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

PAN-OS · Palo Alto Networks

12.1.0 before 12.1.7, 12.1.4-h5; 11.2.0 before 11.2.12, 11.2.10-h6, 11.2.7-h13, 11.2.4-h17; 11.1.0 before 11.1.15, 11.1.13-h5, 11.1.10-h25, 11.1.7-h6, 11.1.6-h32, 11.1.4-h33; 10.2.0 before 10.2.18-h6, 10.2.16-h7, 10.2.13-h21, 10.2.10-h36, 10.2.7-h34 · source: vendor, NVD

Ruggedcom Ape1808 Firmware · Siemens

All versions, or not specified · source: NVD

RUGGEDCOM APE1808 · Siemens

0 · source: CISA

Affected product

PAN-OS

Palo Alto Networks

All PAN-OS CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-0264

CVE.org

https://www.cve.org/CVERecord?id=CVE-2026-0264

Vendor Advisory

https://security.paloaltonetworks.com/CVE-2026-0264

Third Party Advisory

https://cert-portal.siemens.com/productcert/html/ssa-967325.html