CVE-2026-109453

Analyzed Analyzed - Analysis Complete

Heap-based Buffer Overflow in VHD Miniport Driver

Publication date: 2026-10-13

Last updated on: 2026-10-27

Assigner: Microsoft Corporation

Description

Heap-based buffer overflow in Virtual Hard Disk (VHD) Miniport Driver allows an authorized attacker to elevate privileges locally.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-10-13

Last Modified

2026-10-27

Generated

2026-11-08

AI Q&A

2026-10-14

EPSS Evaluated

2026-11-07

NVD

CVE-2026-109453

EUVD

EUVD-2026-100377

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_server_2012	r2
microsoft	windows_server_2012	*
microsoft	windows_10_1607	to 10.0.14393.9612 (exc)
microsoft	windows_10_1607	to 10.0.14393.9612 (exc)
microsoft	windows_10_1809	to 10.0.17763.9376 (exc)
microsoft	windows_10_1809	to 10.0.17763.9376 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7807 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7807 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7807 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7652 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7652 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9711 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9711 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9711 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9711 (exc)
microsoft	windows_11_26h1	to 10.0.28000.3231 (exc)
microsoft	windows_11_26h1	to 10.0.28000.3231 (exc)
microsoft	windows_server_2025	to 10.0.26100.33650 (exc)
microsoft	windows_server_2022	to 10.0.20348.5761 (exc)
microsoft	windows_server_2016	to 10.0.14393.9612 (exc)
microsoft	windows_server_2019	to 10.0.17763.9376 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7807 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7807 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7807 (exc)

Helpful Resources

Exploitability

CWE

KEV

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().

Attack-Flow Graph

Executive Summary

This is a heap-based buffer overflow vulnerability in the Virtual Hard Disk (VHD) Miniport Driver. An authorized attacker can exploit it to elevate their privileges locally on affected systems.

Detection Guidance

This vulnerability involves a heap-based buffer overflow in the Virtual Hard Disk (VHD) Miniport Driver. Detection typically requires monitoring for unusual system behavior or crashes related to VHD operations. Check Windows Event Logs for application or system crashes involving vhdmp.sys. Use commands like 'sfc /scannow' to verify system file integrity and 'driverquery /v' to list installed drivers for suspicious entries.

Impact Analysis

An attacker with local access could exploit this to gain higher privileges, potentially allowing them to execute arbitrary code, install programs, or access sensitive data on your system.

Compliance Impact

This vulnerability allows local privilege escalation through a heap-based buffer overflow in the VHD Miniport Driver. Such attacks could grant unauthorized access to sensitive systems, potentially violating data protection requirements under GDPR and HIPAA by exposing personal or health information.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the VHD Miniport Driver vulnerability. Monitor Microsoft's update guide for patches and install them promptly.

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