PT-2026-40712 · Palo Alto Networks · Pan-Os

Published 2026-05-13 · Updated 2026-05-19 · CVE-2026-0264

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions PAN-OS (affected versions not specified)

Description A buffer overflow occurs in the DNS proxy and DNS Server features. An unauthenticated attacker with network access can exploit this by sending specially crafted network traffic. This can lead to a denial of service (DoS) condition across all PAN-OS platforms, except Cloud NGFW and Prisma Access, or potentially allow arbitrary code execution on PA-Series hardware. A buffer overflow is a condition where a program writes more data to a memory buffer than it can hold, potentially overwriting adjacent memory.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Heap Based Buffer Overflow

Weakness Enumeration

CWE-122

Related Identifiers

BDU:2026-07272

CVE-2026-0264

Affected Products

Pan-Os

References · 6

• https://security.paloaltonetworks.com/CVE-2026-0264 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-07272 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-0264 · Security Note
• https://twitter.com/threatcluster/status/2054660769459904998 · Twitter Post
• https://reddit.com/r/paloaltonetworks/comments/1ti4crw/panos_1117h6_11110h26_11113h6_1124h17_1127h15 · Reddit Post
• https://cert-portal.siemens.com/productcert/html/ssa-967325.html · Note