CVE-2025-24993 is a heap-based buffer overflow vulnerability identified in the NTFS file system driver of Microsoft Windows 10 Version 1507 (build 10.0.10240.0). The vulnerability arises due to improper handling of heap memory during NTFS operations, which can lead to memory corruption. An attacker with local access and the ability to trick a user into interacting with a crafted NTFS file or volume can exploit this flaw to execute arbitrary code with the privileges of the logged-in user. The vulnerability does not require prior authentication or elevated privileges but does require user interaction, such as opening or accessing a malicious NTFS volume or file. The impact of successful exploitation is severe, allowing full compromise of the affected system, including confidentiality breaches, integrity violations, and denial of service. The CVSS v3.1 vector indicates low attack complexity, no privileges required, and user interaction needed, with full impact on confidentiality, integrity, and availability. Although no public exploits are currently known, the flaw's nature and severity make it a critical concern for legacy Windows 10 users. Microsoft has not yet released a patch, but the vulnerability is officially published and tracked by CISA, indicating imminent remediation efforts.

The vulnerability poses a significant risk to organizations still running Windows 10 Version 1507, which is an outdated and unsupported build. Successful exploitation can lead to arbitrary code execution, allowing attackers to install malware, steal sensitive data, or disrupt system operations. This can result in data breaches, ransomware deployment, or persistent footholds within corporate networks. Since the flaw requires local access and user interaction, insider threats or social engineering attacks could leverage this vulnerability. The broad impact on confidentiality, integrity, and availability means critical systems could be compromised, affecting business continuity and regulatory compliance. Organizations relying on legacy Windows 10 systems in industrial, governmental, or enterprise environments are particularly vulnerable, as these systems often lack modern security controls and are harder to patch promptly.

1. Upgrade affected systems to a supported and fully patched version of Windows 10 or later to eliminate exposure to this vulnerability. 2. Until patches are available, restrict local user access to trusted personnel only and enforce strict user privilege management to minimize attack surface. 3. Disable or limit NTFS features that are not essential, especially removable media or network shares that could be used to deliver malicious NTFS volumes. 4. Implement application whitelisting and endpoint detection and response (EDR) solutions to detect anomalous behavior indicative of exploitation attempts. 5. Educate users about the risks of interacting with unknown or untrusted removable media and network shares. 6. Monitor system logs and security alerts for suspicious NTFS-related activities. 7. Follow guidance from Microsoft and CISA for any emergency workarounds or updates once released.