Elevation of Privilege in Windows Cloud Files Mini Filter Driver by Microsoft

CVE-2026-58536

What is CVE-2026-58536?

CVE-2026-58536 is a vulnerability affecting the Windows Cloud Files Mini Filter Driver developed by Microsoft. This component is essential for managing cloud storage interactions within the Windows operating system, facilitating the handling of cloud-based files seamlessly alongside local files. The vulnerability pertains to a "use after free" flaw, allowing an authorized attacker to elevate their privileges on the system. If exploited, this could enable the attacker to gain unauthorized access to sensitive system components or data, compromising the integrity and security of the entire system. The potential for abuse is significant, particularly for systems that handle critical business processes or sensitive information.

Potential impact of CVE-2026-58536

1. Unauthorized Access: The vulnerability allows attackers with valid credentials to execute local privilege escalation, potentially leading to unauthorized access to restricted system areas and data. This could result in data theft or manipulation.

2. System Compromise: By leveraging this privilege elevation, an attacker can compromise system controls, leading to full administrative access. This may enable further exploitation, risking additional exposure of the organization’s digital assets.

3. Increased Attack Surface: The existence of this vulnerability expands the possible attack vectors for malicious actors. If exploited, it may provide a foothold for broader attacks, possibly connecting to other vulnerabilities or weaknesses within the infrastructure.

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