Out-of-Bounds Read Vulnerability in Windows NTFS by Microsoft

CVE-2025-27742

What is CVE-2025-27742?

CVE-2025-27742 is a security vulnerability found in the Windows NTFS file system, developed by Microsoft. This vulnerability arises from an out-of-bounds read issue that can potentially allow unauthorized individuals to disclose sensitive information locally. The presence of this vulnerability could pose significant risks to organizations relying on NTFS for data storage, as it could lead to unauthorized data exposure and compromise sensitive internal information, thereby affecting the overall security posture of the organization.

Technical Details

The vulnerability is categorized specifically as an out-of-bounds read, a type of flaw that occurs when a program reads data outside the intended memory boundary. In the context of NTFS, this flaw can potentially allow attackers to access data in memory that they should not have permission to view. Although this vulnerability has been acknowledged, there are currently no known exploitations in the wild, which places some urgency on organizations to address the issue proactively before it can be targeted in more malicious ways.

Potential Impact of CVE-2025-27742

1. Information Disclosure: The most critical risk posed by this vulnerability is the potential for unauthorized access to sensitive files and data, leading to information disclosure which could be exploited for various malicious purposes.

2. Data Privacy Concerns: Organizations could face serious consequences regarding data privacy regulations and compliance if sensitive information is disclosed due to this vulnerability, exposing them to legal and financial repercussions.

3. Integration and Security Compromise: Systems using NTFS may be integrated into larger networks. A breach could compromise not just data on the affected system but also allow further attacks to other connected systems within an organization’s infrastructure.

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