Win32k Elevation of Privilege Vulnerability
Summary
| CVE | CVE-2020-1143 |
|---|---|
| State | PUBLISHED |
| Assigner | microsoft |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2020-05-21 23:15:16 UTC |
| Updated | 2026-08-19 17:17:23 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 7.8 HIGH from [email protected]
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.012840000 probability, percentile 0.678030000 (date 2026-08-19)
Problem Types: NVD-CWE-noinfo | Elevation of Privilege
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | [email protected] | Primary | 7 | HIGH | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | CVSS | 7 | HIGH | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C |
| 2.0 | [email protected] | Primary | 7.2 | AV:L/AC:L/Au:N/C:C/I:C/A:C |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v2.0 Breakdown
Access Vector
LocalAccess Complexity
LowAuthentication
NoneConfidentiality
CompleteIntegrity
CompleteAvailability
CompleteAV:L/AC:L/Au:N/C:C/I:C/A:C
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Microsoft | Windows 10 | - | All | All | All |
| Operating System | Microsoft | Windows 10 | - | All | All | All |
| Operating System | Microsoft | Windows 10 | 1607 | All | All | All |
| Operating System | Microsoft | Windows 10 | 1607 | All | All | All |
| Operating System | Microsoft | Windows 10 | 1709 | All | All | All |
| Operating System | Microsoft | Windows 10 | 1803 | All | All | All |
| Operating System | Microsoft | Windows 10 | 1809 | All | All | All |
| Operating System | Microsoft | Windows 10 | 1903 | All | All | All |
| Operating System | Microsoft | Windows 10 | 1909 | All | All | All |
| Operating System | Microsoft | Windows 7 | - | sp1 | All | All |
| Operating System | Microsoft | Windows 7 | - | sp1 | All | All |
| Operating System | Microsoft | Windows 8.1 | - | All | All | All |
| Operating System | Microsoft | Windows 8.1 | - | All | All | All |
| Operating System | Microsoft | Windows Rt 8.1 | - | All | All | All |
| Operating System | Microsoft | Windows Server 2008 | - | sp2 | All | All |
| Operating System | Microsoft | Windows Server 2008 | - | sp2 | All | All |
| Operating System | Microsoft | Windows Server 2008 | - | sp2 | All | All |
| Operating System | Microsoft | Windows Server 2008 | r2 | sp1 | All | All |
| Operating System | Microsoft | Windows Server 2012 | - | All | All | All |
| Operating System | Microsoft | Windows Server 2012 | r2 | All | All | All |
| Operating System | Microsoft | Windows Server 2016 | - | All | All | All |
| Operating System | Microsoft | Windows Server 2019 | - | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Microsoft | Windows 10 Version 1507 | affected 10.0.10240.0 publication custom | 32-bit Systems, x64-based Systems |
| CNA | Microsoft | Windows 10 Version 1607 | affected 10.0.14393.0 publication custom | 32-bit Systems, x64-based Systems |
| CNA | Microsoft | Windows 10 Version 1709 | affected 10.0.0 publication custom | ARM64-based Systems, x64-based Systems |
| CNA | Microsoft | Windows 10 Version 1709 For 32-bit Systems | affected 10.0.0 publication custom | 32-bit Systems |
| CNA | Microsoft | Windows 10 Version 1803 | affected 10.0.0 publication custom | 32-bit Systems, ARM64-based Systems, x64-based Systems |
| CNA | Microsoft | Windows 10 Version 1809 | affected 10.0.17763.0 publication custom | 32-bit Systems, x64-based Systems |
| CNA | Microsoft | Windows 10 Version 1809 | affected 10.0.0 publication custom | ARM64-based Systems |
| CNA | Microsoft | Windows 10 Version 1903 For 32-bit Systems | affected 10.0.0 publication custom | Not specified |
| CNA | Microsoft | Windows 10 Version 1903 For ARM64-based Systems | affected 10.0.0 publication custom | Not specified |
| CNA | Microsoft | Windows 10 Version 1903 For X64-based Systems | affected 10.0.0 publication custom | Not specified |
| CNA | Microsoft | Windows 10 Version 1909 | affected 10.0.0 publication custom | 32-bit Systems, ARM64-based Systems, x64-based Systems |
| CNA | Microsoft | Windows 7 | affected 6.1.0 publication custom | 32-bit Systems |
| CNA | Microsoft | Windows 7 Service Pack 1 | affected 6.1.0 publication custom | x64-based Systems |
| CNA | Microsoft | Windows 8.1 | affected 6.3.0 publication custom | 32-bit Systems, ARM64-based Systems, x64-based Systems |
| CNA | Microsoft | Windows Server 2008 R2 Service Pack 1 | affected 6.1.7601.0 publication custom | x64-based Systems |
| CNA | Microsoft | Windows Server 2008 R2 Service Pack 1 Server Core Installation | affected 6.1.7601.0 publication custom | x64-based Systems |
| CNA | Microsoft | Windows Server 2008 Service Pack 2 | affected 6.0.6003.0 publication custom | 32-bit Systems, x64-based Systems |
| CNA | Microsoft | Windows Server 2008 Service Pack 2 Server Core Installation | affected 6.0.6003.0 publication custom | 32-bit Systems, x64-based Systems |
| CNA | Microsoft | Windows Server 2012 | affected 6.2.9200.0 publication custom | x64-based Systems |
| CNA | Microsoft | Windows Server 2012 Server Core Installation | affected 6.2.9200.0 publication custom | x64-based Systems |
| CNA | Microsoft | Windows Server 2012 R2 | affected 6.3.9600.0 publication custom | x64-based Systems |
| CNA | Microsoft | Windows Server 2012 R2 Server Core Installation | affected 6.3.9600.0 publication custom | x64-based Systems |
| CNA | Microsoft | Windows Server 2016 | affected 10.0.14393.0 publication custom | x64-based Systems |
| CNA | Microsoft | Windows Server 2016 Server Core Installation | affected 10.0.14393.0 publication custom | x64-based Systems |
| CNA | Microsoft | Windows Server 2019 | affected 10.0.17763.0 publication custom | x64-based Systems |
| CNA | Microsoft | Windows Server 2019 Server Core Installation | affected 10.0.17763.0 publication custom | x64-based Systems |
| CNA | Microsoft | Windows Server Version 1803 Server Core Installation | affected 10.0.0 publication custom | x64-based Systems |
| CNA | Microsoft | Windows Server Version 1903 Server Core Installation | affected 10.0.0 publication custom | x64-based Systems |
| CNA | Microsoft | Windows Server Version 1909 Server Core Installation | affected 10.0.0 publication custom | x64-based Systems |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1143 | [email protected] | msrc.microsoft.com | |
| portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1143 | af854a3a-2127-422b-91ae-364da2661108 | portal.msrc.microsoft.com | Patch, Vendor Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.