CVE-2026-88120
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Use After Free in Windows DHCP Server Allows Remote Code Execution

Publication date: 2026-10-13

Last updated on: 2026-10-13

Assigner: Microsoft Corporation

Description
Use after 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
2026-10-14
AI Q&A
2026-10-14
EPSS Evaluated
N/A
NVD
CVE-2026-88120
EUVD
EUVD-2026-100154

Affected Vendors & Products

Showing 11 associated CPEs
Vendor Product Version / Range
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-416 The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

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Executive Summary

This vulnerability is a use-after-free issue in the Windows DHCP Server. It allows an unauthorized attacker to execute arbitrary code remotely over a network by exploiting a flaw where memory is accessed after it has been freed.

Impact Analysis

An attacker could exploit this to run malicious code on affected systems, potentially leading to unauthorized access, data theft, or system compromise. Systems running vulnerable Windows Server versions are at risk.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the Windows DHCP Server vulnerability. Disable the DHCP Server service if not in use until patched. Monitor network traffic for unusual activity related to DHCP requests.

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