CVE-2026-50668

Analyzed Analyzed - Analysis Complete

Heap-based Buffer Overflow in Windows NTFS

Publication date: 2026-07-14

Last updated on: 2026-07-22

Assigner: Microsoft Corporation

Description

Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to elevate privileges with a physical attack.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-07-14

Last Modified

2026-07-22

Generated

2026-08-04

AI Q&A

2026-07-15

EPSS Evaluated

2026-08-02

NVD

CVE-2026-50668

EUVD

EUVD-2026-44125

Affected Vendors & Products

Vendor	Product	Version / Range
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)
microsoft	windows_11_26h1	to 10.0.28000.2525 (exc)
microsoft	windows_11_26h1	to 10.0.28000.2525 (exc)
microsoft	windows_11_24h2	to 10.0.26100.8875 (exc)
microsoft	windows_11_24h2	to 10.0.26100.8875 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7548 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7548 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7548 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7548 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7548 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7548 (exc)
microsoft	windows_11_25h2	to 10.0.26200.8875 (exc)
microsoft	windows_11_25h2	to 10.0.26200.8875 (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 Windows NTFS. It allows an unauthorized attacker to elevate their privileges by exploiting a flaw in memory handling during physical access to the system.

Detection Guidance

This vulnerability requires physical access to exploit, so detection focuses on monitoring for unusual activity during physical access attempts. Check Windows Event Logs for NTFS-related errors or crashes. Use commands like 'fsutil fsinfo volumeinfo C:' to verify NTFS integrity. Ensure all Windows updates are applied to patch this issue.

Impact Analysis

An attacker with physical access could exploit this to gain higher privileges on your system, potentially allowing them to take control of your device or access sensitive data.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, which may violate compliance requirements for GDPR, HIPAA, or other regulations that mandate strict data protection controls.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the NTFS heap-based buffer overflow vulnerability. Ensure physical access controls are in place to prevent unauthorized attackers from exploiting this issue.

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