CVE-2026-69463
Awaiting Analysis Awaiting Analysis - Queue

Heap-based Buffer Overflow in Windows NTFS

Publication date: 2026-09-08

Last updated on: 2026-09-09

Assigner: Microsoft Corporation

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

CVSS Scores

EPSS Scores

Probability:
Percentile:

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-2026-69463

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
microsoft windows_ntfs *

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
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

AI Quick Actions

Instant insights powered by AI
Executive Summary

This is a heap-based buffer overflow in Windows NTFS that allows an unauthorized attacker to execute arbitrary code remotely over a network. It occurs due to improper memory handling in the NTFS component, enabling attackers to overwrite adjacent memory and gain control of the system.

Impact Analysis

An attacker could exploit this to run malicious code on your system, potentially stealing data, installing malware, or taking full control of affected machines. Since it is network-executable, no local access is required, making it highly dangerous for unpatched systems.

Mitigation Strategies

Apply the latest security updates from Microsoft for Windows NTFS. Disable network access to systems running vulnerable NTFS versions until patched. Monitor network traffic for unusual activity targeting NTFS components.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-69463. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart