CVE-2026-50485 Microsoft CVE debrief

Who should care

System administrators and security teams responsible for Windows Hyper-V systems should be aware of this vulnerability and take steps to mitigate it. They should review and update system configurations to ensure Hyper-V is properly secured and monitor system logs for potential exploitation attempts.

Technical summary

The vulnerability is a buffer over-read issue in Windows Hyper-V. An authorized local attacker could exploit this vulnerability to cause a denial of service via an adjacent network. The CVSS vector for this vulnerability is CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H. This vulnerability affects Windows Hyper-V systems, and system administrators should review and update system configurations to ensure Hyper-V is properly secured.

Defensive priority

Medium priority

Recommended defensive actions

• Apply the patch released by Microsoft
• Review and update system configurations to ensure Hyper-V is properly secured
• Monitor system logs for potential exploitation attempts
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record was published on 2026-07-14T18:17:54.560Z and was last modified on 2026-07-21T18:22:37.117Z. The NVD entry is currently Analyzed. This vulnerability affects Windows Hyper-V systems, and an authorized local attacker could exploit it to cause a denial of service via an adjacent network. The CVSS vector for this vulnerability is CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H. The vulnerability has a CVSS score of 4.5 and a severity rating of MEDIUM. Microsoft has released a patch for this vulnerability. Evidence limits suggest that additional information may be available from Microsoft or other sources, but it has not been verified.

Official resources