CVE-2026-69829

Analyzed Analyzed - Analysis Complete

Heap-based Buffer Overflow in Windows Shell

Publication date: 2026-09-08

Last updated on: 2026-09-24

Assigner: Microsoft Corporation

Description

Heap-based buffer overflow in Windows Shell allows an unauthorized attacker to execute code over a network.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-08

Last Modified

2026-09-24

Generated

2026-09-29

AI Q&A

2026-09-09

EPSS Evaluated

2026-09-27

NVD

CVE-2026-69829

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_shell	*

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 Windows Shell. It allows an unauthorized attacker to execute arbitrary code remotely over a network without needing any prior access or privileges.

Impact Analysis

An attacker could exploit this to run malicious code on your system, potentially stealing data, installing malware, or taking control of your device. Since it requires no user interaction and works over a network, it poses a high risk.

Compliance Impact

This vulnerability could lead to unauthorized access and data breaches, violating GDPR and HIPAA requirements for data protection and confidentiality. Organizations may face penalties for failing to address critical vulnerabilities that risk exposing sensitive data.

Mitigation Strategies

Apply the latest security updates from Microsoft immediately to patch the heap-based buffer overflow in Windows Shell. Monitor Microsoft's update guide for additional guidance.

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