CVE-2026-0264
📛 CVE Title
PAN-OS: Heap-Based Buffer Overflow in DNS Proxy and DNS Server Allows Unauthenticated Remote Code Execution
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.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- palo_alto
- CVSS severity
- HIGH
- CVSS score
- 7.2 / 10
- CVSS vector
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N/E:U/AU:Y/R:U/V:C/RE:H/U:Red- Effective score
- 7.2 / 10 HIGH source: CNA overview
- CWE(s)
-
CWE-122 - Reserved
- 2025-11-03
- Published
- 2026-05-13 17:40 UTC
- Last updated
- 2026-05-14 03:56 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/0xxx/CVE-2026-0264.json
- Linked Threat
- CVE-2026-0264 — PAN-OS: Heap-Based Buffer Overflow in DNS Proxy and DNS Server Allows Unauthenticated Remote Code Execution
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2026-05-13 18:16:14 UTC
- NVD last modified
- 2026-05-13 18:17:47 UTC
- EPSS score
- 0.0009 (probability of exploitation in next 30 days)
- EPSS percentile
- 26.19% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24
NVD / KEV / EPSS data refreshed 2026-05-25 04:49 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-30065 - Assigner
- palo_alto
- Published
- May 13, 2026, 5:40:36 PM
- Updated
- May 14, 2026, 3:56:31 AM
- EUVD base score (CVSS 4.0)
-
7.2 / 10
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N/E:U/AU:Y/R:U/V:C/RE:H/U:Red - EUVD-reported EPSS
- 0.1000
- Vendors
- Palo Alto Networks
- Products
-
PAN-OS (10.2.0 <10.2.18-h6, 10.2.16-h7, 10.2.13-h21, 10.2.10-h36, 10.2.7-h34)Cloud NGFWPAN-OS (12.1.0 <12.1.7, 12.1.4-h5)PAN-OS (11.1.0 <11.1.15, 11.1.13-h5, 11.1.10-h25, 11.1.7-h6, 11.1.6-h32, 11.1.4-h33)PAN-OS (11.2.0 <11.2.12, 11.2.10-h6, 11.2.7-h13, 11.2.4-h17)Prisma Access
ENISA 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.
EUVD references (1)
Affected products (3)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| Palo Alto Networks | Cloud NGFW |
All (unaffected)
|
AWS, Azure |
| Palo Alto Networks | PAN-OS |
12.1.0 (affected),
11.2.0 (affected),
11.1.0 (affected),
10.2.0 (affected)
|
— |
| Palo Alto Networks | Prisma Access |
All (unaffected)
|
— |
Vendor references (1)
References embedded in the original CVE record by the assigning CNA.
- https://security.paloaltonetworks.com/CVE-2026-0264 vendor-advisory
Web references (7)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- http://cwe.mitre.org/data/definitions/122.html rapid7:cwe.mitre.org
- https://attackerkb.com/topics/CVE-2026-0264 rapid7:attackerkb.com
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-30065 rapid7:euvd.enisa.europa.eu
- https://nvd.nist.gov/vuln/detail/CVE-2026-0264 tenable:nvd.nist.gov
- https://security.paloaltonetworks.com/CVE-2026-0264 tenable:security.paloaltonetworks.com
- https://www.cve.org/CVERecord?id=CVE-2026-0264 tenable:www.cve.org
- https://www.first.org/epss/ tenable:www.first.org
NVD-tagged references (1)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://security.paloaltonetworks.com/CVE-2026-0264 psirt@paloaltonetworks.com
Indicators (1)
IOCs linked to the auto-promoted Threat row.
| Type | Value | VirusTotal | Attached |
|---|---|---|---|
| cve |
CVE-2026-0264
|
no local data | 2026-05-14 09:33 UTC |
Remediations (8)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:blog.qualys.com
With Qualys Policy Audit's out-of-the-box mitigation or Compensatory Controls, which reduce the risk of a vulnerability being exploited because the remediation ( fix / patch ) cannot be done immediately, these security controls are not recommended by any industry standards, such as CIS and DISA-STIG.
2026-05-17 01:24 UTC -
web:blog.talosintelligence.com
Microsoft has released its monthly security update for April 2026 , which includes 165 vulnerabilities affecting a wide range of products, including eight Microsoft marked as "critical." CVE - 2026 -23666 is a critical Denial of Service (DoS) vulnerability that affects the .NET framework. Successful exploitation could allow the attacker to deny service over the network. CVE - 2026 -32157 is a ...
2026-05-17 01:24 UTC -
web:blogs.oracle.com
For more information about the Critical Patch Update program, see the security vulnerability remediation practices page located on the Oracle Trust Center.
2026-05-17 01:24 UTC -
web:layerlogix.com
April 2026 Patch Tuesday drops today. Here's what's critical, what to patch first, and how Houston IT teams should handle deployment — including the Secure Boot certificate deadline reminder.
2026-05-17 01:24 UTC -
web:portal.msrc.microsoft.com
The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.
2026-05-17 01:24 UTC -
web:support.apple.com
This document describes the security content of iOS 26.4 and iPadOS 26.4.
2026-05-17 01:24 UTC -
web:www.oracle.com
This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.
2026-05-17 01:24 UTC -
web:zecurit.com
Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .
2026-05-17 01:24 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-0264.json.
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"value": "<p>This issue is applicable only to PAN-OS firewalls if either of the following conditions are true:</p><ol><li>DNS Proxy is enabled (<b>Network > DNS Proxy</b>) <b>AND </b>a network interface is attached to DNS Proxy. <br><b>OR</b><br></li><li>The DNS server (<b>Device</b> ><b> Setup </b>> <b>Services</b>) configured on NGFW is a compromised public untrusted IP address.<br><br></li></ol><p>The risk is higher if the interface is externally exposed to an untrusted network. Further documentation on <a target=\"_blank\" rel=\"nofollow\" href=\"https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000ClFcCAK\">configuring DNS Proxy can be found here</a>.</p>"
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"value": "<table class=\"tbl\"><thead><tr><th>Version</th><th>Minor Version</th><th>Suggested Solution</th></tr></thead><tbody><tr><td> Cloud NGFW</td><td> </td><td>No action needed</td></tr><tr><td>PAN-OS 12.1</td><td>12.1.5 through 12.1.6</td><td>Upgrade to 12.1.7 or later.</td></tr><tr><td><br></td><td>12.1.2 through 12.1.4-h*</td><td>Upgrade to 12.1.4-h5 or 12.1.7 or later.</td></tr><tr><td>PAN-OS 11.2</td><td>11.2.11 or later</td><td>Upgrade to 11.2.12 or later.</td></tr><tr><td><br></td><td>11.2.8 through 11.2.10-h*</td><td>Upgrade to 11.2.10-h6 or 11.2.12 or later.</td></tr><tr><td><br></td><td>11.2.5 through 11.2.7-h*</td><td>Upgrade to 11.2.7-h13 or 11.2.10 or later.</td></tr><tr><td><br></td><td>11.2.0 through 11.2.4-h*</td><td>Upgrade to 11.2.4-h17 or 11.2.7 or later.</td></tr><tr><td>PAN-OS 11.1</td><td>11.1.14 or later</td><td>Upgrade to 11.1.15 or later.</td></tr><tr><td><br></td><td>11.1.11 through 11.1.13-h*</td><td>Upgrade to 11.1.13-h5 or 11.1.15 or later.</td></tr><tr><td><br></td><td>11.1.8 through 11.1.10-h*</td><td>Upgrade to 11.1.10-h25 or 11.1.15 or later.</td></tr><tr><td><br></td><td>11.1.7 through 11.1.7-h*</td><td>Upgrade to 11.1.7-h6 or 11.1.15 or later.</td></tr><tr><td><br></td><td>11.1.5 through 11.1.6-h*</td><td>Upgrade to 11.1.6-h32 or 11.1.15 or later.</td></tr><tr><td><br></td><td>11.1.0 through 11.1.4-h*</td><td>Upgrade to 11.1.4-h33 or 11.1.15 or later.</td></tr><tr><td>PAN-OS 10.2</td><td>10.2.17 through 10.2.18-h*</td><td>Upgrade to 10.2.18-h6 or later.</td></tr><tr><td> </td><td>10.2.14 through 10.2.16-h*</td><td>Upgrade to 10.2.16-h7 or 10.2.18-h6 or later.</td></tr><tr><td><br></td><td>10.2.11 through 10.2.13-h*</td><td>Upgrade to 10.2.13-h21 or 10.2.18-h6 or later.</td></tr><tr><td><br></td><td>10.2.8 through 10.2.10-h*</td><td>Upgrade to 10.2.10-h36 or 10.2.18-h6 or later.</td></tr><tr><td> </td><td>10.2.0 through 10.2.7-h*</td><td>Upgrade to 10.2.7-h34 or 10.2.18-h6 or later.</td></tr><tr><td>Prisma Access </td><td><br></td><td>No action needed. </td></tr><tr><td> All older unsupported PAN-OS versions</td><td> </td><td> Upgrade to a supported fixed version.</td></tr></tbody></table>"
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"value": "VERSION MINOR VERSION SUGGESTED SOLUTION\nCloud NGFW No action needed\nPAN-OS 12.1 12.1.5 through 12.1.6 Upgrade to 12.1.7 or later.\n 12.1.2 through 12.1.4-h* Upgrade to 12.1.4-h5 or 12.1.7 or later.\nPAN-OS 11.2 11.2.11 or later Upgrade to 11.2.12 or later.\n 11.2.8 through 11.2.10-h* Upgrade to 11.2.10-h6 or 11.2.12 or later.\n 11.2.5 through 11.2.7-h* Upgrade to 11.2.7-h13 or 11.2.10 or later.\n 11.2.0 through 11.2.4-h* Upgrade to 11.2.4-h17 or 11.2.7 or later.\nPAN-OS 11.1 11.1.14 or later Upgrade to 11.1.15 or later.\n 11.1.11 through 11.1.13-h* Upgrade to 11.1.13-h5 or 11.1.15 or later.\n 11.1.8 through 11.1.10-h* Upgrade to 11.1.10-h25 or 11.1.15 or later.\n 11.1.7 through 11.1.7-h* Upgrade to 11.1.7-h6 or 11.1.15 or later.\n 11.1.5 through 11.1.6-h* Upgrade to 11.1.6-h32 or 11.1.15 or later.\n 11.1.0 through 11.1.4-h* Upgrade to 11.1.4-h33 or 11.1.15 or later.\nPAN-OS 10.2 10.2.17 through 10.2.18-h* Upgrade to 10.2.18-h6 or later.\n 10.2.14 through 10.2.16-h* Upgrade to 10.2.16-h7 or 10.2.18-h6 or later.\n 10.2.11 through 10.2.13-h* Upgrade to 10.2.13-h21 or 10.2.18-h6 or later.\n 10.2.8 through 10.2.10-h* Upgrade to 10.2.10-h36 or 10.2.18-h6 or later.\n 10.2.0 through 10.2.7-h* Upgrade to 10.2.7-h34 or 10.2.18-h6 or later.\nPrisma Access No action needed. \nAll older unsupported PAN-OS versions Upgrade to a supported fixed version."
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"lang": "en",
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"title": "PAN-OS: Heap-Based Buffer Overflow in DNS Proxy and DNS Server Allows Unauthenticated Remote Code Execution",
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"value": "Customers can mitigate the risk of this issue by taking either of the following actions:<br><br>Action 1: <br><ul><li>Disassociate DNS Proxy from externally accessible interfaces in order to reduce your attack surface; <b>AND</b></li><li>Configure DNS server with a RFC1918 or a public trusted IP address.<br></li></ul><b>OR </b>Action 2:<br><ul><li>Disable the DNS Proxy feature (<b>Network</b> > <b>DNS</b> <b>Proxy</b>) if it is not being used; <b>AND</b></li><li>Configure DNS server with a RFC1918 or a public trusted IP address.</li></ul><p>Customers with a Threat Prevention subscription can block attacks for this vulnerability by enabling Threat ID 510027 from Applications and Threats content version 9100-10044 and later.</p><p></p>"
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"value": "Customers can mitigate the risk of this issue by taking either of the following actions:\n\nAction 1: \n\n * Disassociate DNS Proxy from externally accessible interfaces in order to reduce your attack surface; AND\n * Configure DNS server with a RFC1918 or a public trusted IP address.\n \n\nOR Action 2:\n\n * Disable the DNS Proxy feature (Network > DNS Proxy) if it is not being used; AND\n * Configure DNS server with a RFC1918 or a public trusted IP address.\n\nCustomers with a Threat Prevention subscription can block attacks for this vulnerability by enabling Threat ID 510027 from Applications and Threats content version 9100-10044 and later."
}
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},
"cveMetadata": {
"assignerOrgId": "d6c1279f-00f6-4ef7-9217-f89ffe703ec0",
"assignerShortName": "palo_alto",
"cveId": "CVE-2026-0264",
"datePublished": "2026-05-13T17:40:36.602Z",
"dateReserved": "2025-11-03T20:44:24.711Z",
"dateUpdated": "2026-05-14T03:56:31.192Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}