cve 2026 57092

This tag tracks CVE 2026 57092, also identified as CVE-2026-57092, a critical elevation-of-privilege vulnerability in the Windows VMSwitch networking component used by Hyper-V. Microsoft addressed the issue in its July 2026 security updates. The flaw is described as a use-after-free vulnerability that can allow an authorized attacker to elevate privileges over a network, with a CVSS 3.1 score of 9.9. Its practical relevance is greatest on supported Windows client and server systems running Hyper-V, particularly where virtual machines share a host. This archive provides a focused reference for the vulnerability, affected virtualization environments, and the corresponding Microsoft patch.