CVE-2020-1143

high

Description

An elevation of privilege vulnerability exists in Windows when the Windows kernel-mode driver fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control of an affected system. The update addresses this vulnerability by correcting how the Windows kernel-mode driver handles objects in memory.

References

https://www.tenable.com/blog/microsoft-s-may-2020-patch-tuesday-addresses-111-cves

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1143

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1143

Details

Source: Mitre, NVD

Published: 2020-05-21

Updated: 2026-08-19

Risk Information

CVSS v2

Base Score: 6

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

Severity: Medium

CVSS v3

Base Score: 7

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

Severity: High

EPSS

EPSS: 0.0073