CVE-2020-1243

Windows Hyper-V Denial of Service Vulnerability

High · published October 16, 2020

CVSS v3.1
7.8
EPSS
1%
Percentile
59.3
In the wild
Unconfirmed
What it is

<p>A denial of service vulnerability exists when Microsoft Hyper-V on a host server fails to properly validate specific malicious data from a user on a guest operating system.</p>

<p>To exploit the vulnerability, an attacker who already has a privileged account on a guest operating system, running as a virtual machine, could run a specially crafted application.</p>

<p>The security update addresses the vulnerability by resolving the conditions where Hyper-V would fail to handle these requests.</p>

The record
Technical detail
CVSS v3.1
7.8 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
CVSS v4.0
Not supplied
EPSS
0.00900 · 59.3th percentile
Published
2020-10-16T22:18Z
EPSS history
Timeline
  • 16 OCT 22:18Z
    Windows Hyper-V Denial of Service Vulnerability
    cvelistv5