CVE-2026-50370

Analyzed Analyzed - Analysis Complete

Heap-based Buffer Overflow in Windows DHCP Server

Publication date: 2026-07-14

Last updated on: 2026-07-20

Assigner: Microsoft Corporation

Description

Heap-based buffer overflow in Windows DHCP Server allows an unauthorized attacker to execute code over an adjacent network.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-07-14

Last Modified

2026-07-20

Generated

2026-08-04

AI Q&A

2026-07-15

EPSS Evaluated

2026-08-02

NVD

CVE-2026-50370

EUVD

EUVD-2026-43878

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_server_2012	r2
microsoft	windows_server_2012	*
microsoft	windows_10_1607	to 10.0.14393.9339 (exc)
microsoft	windows_10_1607	to 10.0.14393.9339 (exc)
microsoft	windows_10_1809	to 10.0.17763.9020 (exc)
microsoft	windows_10_1809	to 10.0.17763.9020 (exc)
microsoft	windows_server_2016	to 10.0.14393.9339 (exc)
microsoft	windows_server_2019	to 10.0.17763.9020 (exc)
microsoft	windows_server_2022	to 10.0.20348.5386 (exc)
microsoft	windows_server_2025	to 10.0.26100.33158 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-20	The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
CWE-122	A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

Attack-Flow Graph

Executive Summary

This is a heap-based buffer overflow vulnerability in the Windows DHCP Server. It allows an unauthorized attacker to execute arbitrary code over an adjacent network by exploiting a flaw in memory handling.

Detection Guidance

Detection requires checking for vulnerable Windows DHCP Server versions. Use PowerShell: Get-WindowsFeature DHCP | Select-Object Name,InstallState. Verify installed updates with: Get-HotFix | Where-Object {$_.HotFixID -like 'KB*'}. Monitor network traffic for unusual DHCP server behavior.

Impact Analysis

An attacker could gain control of the DHCP server, leading to potential system compromise, data theft, or further network infiltration. This could disrupt network services and expose sensitive information.

Compliance Impact

This vulnerability could lead to unauthorized access and data breaches, violating confidentiality requirements in GDPR and HIPAA. Organizations may face legal penalties and reputational damage.

Mitigation Strategies

Apply the latest security updates from Microsoft for Windows DHCP Server as soon as possible to patch the heap-based buffer overflow vulnerability.

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