Description
Heap-based buffer overflow in Windows DHCP Server allows an authorized attacker to execute code over a network.
Published: 2026-09-08
Score: 8.8 High
EPSS: < 1% Very Low
KEV: No
Impact: Remote Code Execution
Action: Immediate Patch
AI Analysis

Impact

A heap-based buffer overflow in the Windows DHCP Server component permits an authorized attacker to execute arbitrary code over a network. The flaw can be triggered by sending specially crafted DHCP messages, enabling the attacker to take control of the server process.

Affected Systems

Microsoft Windows 10, versions 1607 and 1809, and Windows Server editions from 2012 through 2025 (including Server Core installations). Users running any of these operating systems with the DHCP Server role are at risk.

Risk and Exploitability

The vulnerability has a CVSS score of 8.8, indicating high severity. The EPSS score is not available, and it is not listed in the CISA KEV catalog. The attack vector is network-based, and the description specifies that an authorized attacker is required to exploit the flaw.

Generated by OpenCVE AI on September 8, 2026 at 22:46 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Install the Microsoft security update for CVE-2026-69547 from the Microsoft Update Catalog or the Windows Update service.
  • If an immediate patch cannot be applied, consider disabling or removing the DHCP Server role from the affected system until the update is available.
  • Implement monitoring of DHCP traffic for anomalous requests and enforce stricter authentication controls on management interfaces to reduce the likelihood of an authorized attacker exploiting the flaw.

Generated by OpenCVE AI on September 8, 2026 at 22:46 UTC.

Tracking

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Advisories

No advisories yet.

History

Thu, 24 Sep 2026 19:15:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*

Fri, 11 Sep 2026 23:45:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Thu, 10 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
First Time appeared Microsoft windows Server 2012 (server Core Installation)
Microsoft windows Server 2012 R2
Microsoft windows Server 2012 R2 (server Core Installation)
Microsoft windows Server 2016 (server Core Installation)
Microsoft windows Server 2019 (server Core Installation)
Microsoft windows Server 2025 (server Core Installation)
Vendors & Products Microsoft windows Server 2012 (server Core Installation)
Microsoft windows Server 2012 R2
Microsoft windows Server 2012 R2 (server Core Installation)
Microsoft windows Server 2016 (server Core Installation)
Microsoft windows Server 2019 (server Core Installation)
Microsoft windows Server 2025 (server Core Installation)

Tue, 08 Sep 2026 17:30:00 +0000

Type Values Removed Values Added
Description Heap-based buffer overflow in Windows DHCP Server allows an authorized attacker to execute code over a network.
Title Windows DHCP Server Remote Code Execution Vulnerability
First Time appeared Microsoft
Microsoft windows 10 1607
Microsoft windows 10 1809
Microsoft windows Server 2012
Microsoft windows Server 2012 R2
Microsoft windows Server 2016
Microsoft windows Server 2019
Microsoft windows Server 2022
Microsoft windows Server 2025
Weaknesses CWE-122
CPEs cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2012_R2:*:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft windows 10 1607
Microsoft windows 10 1809
Microsoft windows Server 2012
Microsoft windows Server 2012 R2
Microsoft windows Server 2016
Microsoft windows Server 2019
Microsoft windows Server 2022
Microsoft windows Server 2025
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'}

Subscriptions

Microsoft Windows 10 1607 Windows 10 1809 Windows Server 2012 Windows Server 2012 (server Core Installation) Windows Server 2012 R2 Windows Server 2012 R2 Windows Server 2012 R2 (server Core Installation) Windows Server 2016 Windows Server 2016 (server Core Installation) Windows Server 2019 Windows Server 2019 (server Core Installation) Windows Server 2022 Windows Server 2025 Windows Server 2025 (server Core Installation)
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-09-25T21:35:44.758Z

Reserved: 2026-08-03T21:12:04.478Z

Link: CVE-2026-69547

cve-icon Vulnrichment

Updated: 2026-09-10T20:56:42.615Z

cve-icon NVD

Status : Analyzed

Published: 2026-09-08T18:19:23.107

Modified: 2026-09-24T23:18:04.730

Link: CVE-2026-69547

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-10T20:59:23Z

Weaknesses
  • CWE-122

    Heap-based Buffer Overflow