CVE-2026-83766

medium

Description

Incorrect authorization in Windows Hyper-V allows an authorized attacker to bypass a security feature over an adjacent network.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83766

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-99987

Details

Source: Mitre, NVD

Published: 2026-10-13

Updated: 2026-10-13

Risk Information

CVSS v2

Base Score: 4

Vector: CVSS2#AV:A/AC:H/Au:M/C:N/I:C/A:N

Severity: Medium

CVSS v3

Base Score: 4.2

Vector: CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N

Severity: Medium

EPSS

EPSS: 0.00358