CVE-2026-69603
Undergoing Analysis Undergoing Analysis - In Progress

Heap-based Buffer Overflow in Windows Hyper-V

Publication date: 2026-09-08

Last updated on: 2026-09-09

Assigner: Microsoft Corporation

Description
Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to execute code locally.

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Meta Information

Published
2026-09-08
Last Modified
2026-09-09
Generated
2026-09-09
AI Q&A
2026-09-09
EPSS Evaluated
N/A
NVD
CVE-2026-69603

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
microsoft windows_hyper-v *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
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().

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Executive Summary

This is a heap-based buffer overflow vulnerability in Windows Hyper-V. It allows an authorized attacker with local access to execute arbitrary code on the affected system by exploiting a flaw in memory handling.

Impact Analysis

An attacker could gain control of your system, install malware, steal data, or disrupt operations. Since it requires local access, physical or network access to the machine is needed.

Compliance Impact

This vulnerability could lead to unauthorized access, data breaches, or loss of sensitive information, potentially violating GDPR, HIPAA, or other compliance requirements related to data protection and system integrity.

Mitigation Strategies

Apply the latest security updates from Microsoft for Windows Hyper-V to patch the heap-based buffer overflow vulnerability.

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