Security researchers have publicly disclosed a proof-of-concept (PoC) exploit for CVE-2025-21333, a critical elevation-of-privilege vulnerability in Microsoft’s Hyper-V virtualization framework. The vulnerability resides in the vkrnlintvsp.sys driver and enables local attackers to gain SYSTEM privileges through a sophisticated heap manipulation technique. Microsoft rated this flaw as Important (7.8 CVSSv3) in its January 2025 advisory. Vulnerability Overview According to a GitHub report, the […]
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