CVE-2026-70250
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Use After Free in Windows DHCP Client

Publication date: 2026-10-13

Last updated on: 2026-10-13

Assigner: Microsoft Corporation

Description
Use after free in Windows DHCP Client allows an unauthorized attacker to execute code over an adjacent 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-2026-70250
EUVD
EUVD-2026-100133

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-362 The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Attack-Flow Graph

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Executive Summary

This vulnerability is a use after free issue in the Windows DHCP Client. It allows an unauthorized attacker to execute arbitrary code over an adjacent network by exploiting a memory corruption flaw.

Impact Analysis

An attacker within the same network could exploit this to run malicious code on affected systems, potentially leading to unauthorized access, data theft, or system compromise.

Mitigation Strategies

Apply the latest security updates from Microsoft for the DHCP Client component. Disable the DHCP service if not required. Monitor network traffic for unusual activity related to DHCP requests.

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