Description
Out-of-bounds read in Windows DHCP Server allows an authorized attacker to execute code locally.
Published: 2026-09-08
Score: 6.4 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Local code execution via out-of-bounds read in Windows DHCP Server
Action: Apply Patch
AI Analysis

Impact

An out-of-bounds read in the Windows DHCP Server allows an authorized attacker to trigger a memory read beyond valid boundaries that enables the execution of arbitrary code on the host with local privileges. The vulnerability does not contain a denial-of-service component based on the available description; it focuses solely on code execution possibilities.

Affected Systems

Microsoft Windows 10 versions 1607 and 1809, Windows Server 2012 (both standard and Server Core installations), Windows Server 2012 R2 (both standard and Server Core installations), Windows Server 2016, Windows Server 2019 (both standard and Server Core installations), Windows Server 2022, and Windows Server 2025 (both standard and Server Core installations).

Risk and Exploitability

The CVSS score of 6.4 indicates a moderate severity level. The EPSS score of less than 1% suggests a low probability of exploitation in the wild, and the vulnerability is not listed in the CISA KEV catalog. The vulnerable code is reachable only by an authorized attacker with network access to the DHCP service, implying proximity to the target. While the risk is moderate, the impact of any successful exploitation is significant and therefore mitigation should be performed promptly.

Generated by OpenCVE AI on September 9, 2026 at 23:48 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the Microsoft security update for the Windows DHCP Server identified in the Microsoft update guide.
  • Restrict inbound DHCP traffic to trusted internal networks via firewall or network ACL settings to reduce the attack surface for unauthorized packets.
  • If the DHCP Server role is unnecessary on a device, uninstall or disable the role to remove the vulnerable code path.

Generated by OpenCVE AI on September 9, 2026 at 23:48 UTC.

Tracking

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Advisories

No advisories yet.

History

Wed, 16 Sep 2026 15:30:00 +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:*:*:*:*:*:*:*

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)

Wed, 09 Sep 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


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

Type Values Removed Values Added
Description Out-of-bounds read in Windows DHCP Server allows an authorized attacker to execute code locally.
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-125
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': 6.4, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:H/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: 2026-09-25T21:33:20.332Z

Reserved: 2026-08-21T17:26:55.611Z

Link: CVE-2026-77887

cve-icon Vulnrichment

Updated: 2026-09-09T18:56:22.249Z

cve-icon NVD

Status : Analyzed

Published: 2026-09-08T18:20:38.273

Modified: 2026-09-24T23:19:02.343

Link: CVE-2026-77887

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-10T21:06:03Z

Weaknesses