CVE-2020-0909

high

Description

A denial of service vulnerability exists when Hyper-V on a Windows Server fails to properly handle specially crafted network packets. To exploit the vulnerability, an attacker would send specially crafted network packets to the Hyper-V Server. The security update addresses the vulnerability by resolving the conditions where Hyper-V would fail to properly handle these network packets.

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0909

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-0909

Details

Source: Mitre, NVD

Published: 2020-05-21

Updated: 2026-08-19

Risk Information

CVSS v2

Base Score: 7.8

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

Severity: High

CVSS v3

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity: High

EPSS

EPSS: 0.07324