Integer Overflow Leading to Privilege Escalation in Software

Executive Summary

CVE-2026-7162 is an integer overflow vulnerability in the WinFsp software. Successful exploitation of this vulnerability could allow an attacker to gain system-level access to the affected software.

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Detection Guidance

Detecting CVE-2026-7162 on your system involves checking the installed version of WinFsp. This vulnerability affects versions of WinFsp prior to 2026 Beta2.

• Check the installed WinFsp version by running the following command in PowerShell or Command Prompt: 'sc query winfsp' or 'winfsp --version' if the executable is in your PATH.
• Compare the installed version with the fixed version (WinFsp 2026 Beta2 or later). If the installed version is earlier than 2026 Beta2, the system is vulnerable.
• Alternatively, inspect the WinFsp release notes or changelog to confirm whether the installed version includes the fix for CVE-2026-7162.

Network-based detection is not directly applicable since this is a local vulnerability (AV:L in CVSS vector). Focus on host-based checks instead.

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Impact Analysis

If exploited, this vulnerability could allow an attacker to achieve system-level access, which means they could potentially control or manipulate the affected system with high privileges.

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Compliance Impact

The vulnerability in CVE-2026-7162 allows an attacker to achieve system-level access to the affected software. This type of access can lead to unauthorized disclosure, modification, or destruction of sensitive data, which is a critical concern for compliance with standards and regulations.

• GDPR: Unauthorized system-level access could result in a breach of personal data, violating GDPR requirements for data protection and confidentiality. Organizations may face significant fines and legal consequences if such a breach occurs.
• HIPAA: For organizations handling protected health information (PHI), this vulnerability could lead to unauthorized access to sensitive patient data, violating HIPAA's Privacy and Security Rules. This may result in penalties and mandatory corrective actions.

Compliance with these regulations requires organizations to implement appropriate security measures to prevent such vulnerabilities from being exploited. Failure to address this vulnerability could indicate a lack of due diligence in maintaining secure systems, potentially leading to non-compliance.

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Mitigation Strategies

To mitigate the vulnerability CVE-2026-7162, you should update to WinFsp 2026 Beta2 or later, as this release includes the fix for the integer overflow vulnerability.

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