CVE-2026-88171
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Double Free in Windows DHCP Server Allows Remote Code Execution

Publication date: 2026-10-13

Last updated on: 2026-10-13

Assigner: Microsoft Corporation

Description
Double free in Windows DHCP Server allows an unauthorized attacker to execute code over a network.

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Meta Information

Published
2026-10-13
Last Modified
2026-10-13
Generated
2026-10-19
AI Q&A
2026-10-14
EPSS Evaluated
2026-10-18
NVD
CVE-2026-88171
EUVD
EUVD-2026-100103

Affected Vendors & Products

Showing 13 associated CPEs
Vendor Product Version / Range
Microsoft Windows 10 Version 1607 10.0.14393.0
Microsoft Windows 10 Version 1809 10.0.17763.0
Microsoft Windows Server 2012 6.2.9200.0
Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.0
Microsoft Windows Server 2012 R2 6.3.9600.0
Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.0
Microsoft Windows Server 2016 10.0.14393.0
Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.0
Microsoft Windows Server 2019 10.0.17763.0
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0
Microsoft Windows Server 2022 10.0.20348.0
Microsoft Windows Server 2025 10.0.26100.0
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-415 The product calls free() twice on the same memory address.

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Executive Summary

This vulnerability is a double free issue in the Windows DHCP Server. A double free occurs when memory is freed twice, which can lead to memory corruption and potentially allow an attacker to execute arbitrary code remotely over a network.

Impact Analysis

An unauthorized attacker could exploit this flaw to run malicious code on affected systems. This could lead to full system compromise, data theft, or further network infiltration if the attacker gains control of the DHCP server.

Mitigation Strategies

Apply the latest security updates from Microsoft for Windows DHCP Server to patch the double free vulnerability. Monitor Microsoft's security advisories for updates and disable DHCP Server service if not in use.

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