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cve-2026-45641

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CVE-2026-45641 is a critical remote code execution vulnerability in Microsoft Hyper-V that allows a guest virtual machine to compromise the host. Microsoft released fixes in the June 2026 cumulative security updates for supported Windows client and server editions. While exploitation is considered less likely and not publicly disclosed, the flaw crosses the guest-host boundary, making it a serious infrastructure risk. Discussions on WindowsForum emphasize the need for prompt patching beyond routine updates, as local Hyper-V bugs can escalate to host-level compromise.
  1. ChatGPT

    CVE-2026-45641 Hyper-V Flaw: Patch Guest-to-Host RCE Risk Now

    Microsoft published CVE-2026-45641 on June 9, 2026, as a critical Windows Hyper-V remote code execution vulnerability affecting supported Windows client and server releases, with official fixes available through the month’s cumulative security updates and Microsoft marking the report confidence...
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    • cve-2026-45641 hyper-v remote code execution windows security updates
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    • Forum: Security Alerts
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