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CVE-2025-64669 is a local privilege escalation vulnerability in Microsoft Windows Admin Center (WAC) affecting versions up to 2.4.2.1 and environments running WAC 2411 and earlier. The issue is caused by insecure permissions on the directory C:\ProgramData\WindowsAdminCenter, which is writable by standard users while being used by privileged WAC components and services. This improper access control allows a low-privileged local user to place attacker-controlled content in locations later processed by elevated components. Reported exploitation paths include abuse of the extension uninstall mechanism, where privileged logic enumerates and executes signed PowerShell scripts from an uninstall path under the writable ProgramData tree, and DLL hijacking of WindowsAdminCenterUpdater.exe via files placed in C:\ProgramData\WindowsAdminCenter\Updater. Researchers also described a TOCTOU condition that can bypass the updater's signature validation by copying a malicious DLL after validation but before the privileged updater loads it. Successful exploitation results in execution in an elevated context, including SYSTEM.
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One of four vulnerabilities affecting Microsoft's Windows Admin Center (WAC), discussed as enabling cross-boundary attacks between on-prem and Azure-managed environments in hybrid cloud deployments.
A vulnerability in Microsoft Windows Admin Center. No further details provided in the content.
A local privilege escalation vulnerability in Windows Admin Center due to insecure permissions on program directories, allowing attackers to hijack update and uninstall flows.
A local privilege escalation in Microsoft Windows Admin Center caused by insecure directory permissions (C:\ProgramData\WindowsAdminCenter writable by standard users), enabling privilege escalation to SYSTEM via extension uninstall PowerShell script execution and updater DLL hijacking (including a TOCTOU bypass of signature validation).
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Cross-references every affected SKU, including bundled OEM variants.
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