CVE-2026-69463

9.8

Microsoft · Windows

A heap-based buffer overflow in the Windows NTFS driver allows unauthenticated remote attackers to execute arbitrary code.

Executive summary

A critical heap-based buffer overflow vulnerability in the Windows NTFS driver enables unauthenticated remote code execution, posing a severe risk to system integrity and security.

Vulnerability

This is a heap-based buffer overflow (CWE-122) within the Windows NTFS driver. The vulnerability is exploitable by an unauthenticated attacker over a network without requiring user interaction.

Business impact

The CVSS score of 9.8 reflects the extreme severity of this flaw, as it allows full system compromise via remote code execution. Successful exploitation could lead to total data loss, unauthorized access to sensitive information, and significant operational downtime, necessitating immediate remediation across all affected Windows environments.

Remediation

Immediate Action: Apply the relevant security updates provided by Microsoft to patch the NTFS driver to the versions listed in the enrichment data.

Proactive Monitoring: Monitor network traffic for unusual patterns targeting NTFS related services and review system event logs for crashes or unauthorized process execution attempts.

Compensating Controls: Utilize a host-based firewall or network security appliance to restrict access to sensitive Windows ports and services from untrusted sources while preparing for deployment of the patches.

Exploitation status

Public Exploit Available: No

Analyst recommendation

Given the critical CVSS score and the potential for remote code execution, this vulnerability represents a high priority for security teams. Organizations should verify their current Windows build versions against the provided fixed versions and prioritize the installation of the security updates in the next maintenance cycle to eliminate this risk.

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History

  1. Disclosed CVE record published
  2. Collected by CVE Brief via github
  3. Analyst report written
  4. Published in the daily brief critical section

Sources