CVE-2026-83766
MEDIUM severity · CVSS 4.2 · Incorrect authorization
4.2CVSS MEDIUM
Summary
Incorrect authorization in Windows Hyper-V allows an authorized attacker to bypass a security feature over an adjacent network.
Impact & exploitability
Attack vectorAdjacent
Attack complexityHigh
Privileges requiredHigh
User interactionNone
Confidentiality impactNone
Integrity impactHigh
Availability impactNone
Exploit probability (EPSS)0%
CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N
Affected products we track (4)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Official patch: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83766 ↗