CVE-2025-21333

Summary

CVE-2025-21333 is an elevation of privilege vulnerability affecting Windows Hyper-V's NT Kernel Integration component. Maliciously crafted Virtual Service Providers (VSPs) can exploit this weakness to escalate their privileges, potentially gaining full control over the Hyper-V host. Successful exploitation could lead to significant security implications, including unauthorized access to sensitive data and system takeover. Microsoft has released a patch to mitigate this vulnerability and administrators are strongly encouraged to apply it as soon as possible to secure their Hyper-V hosts.

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