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CVE-2020-1027

Microsoft Windows Kernel Privilege Escalation Vulnerability

  • High 7.8
  • Exploited: added to CISA KEV 23 May 2022

Description

An elevation of privilege vulnerability exists in the way that the Windows Kernel handles objects in memory, aka 'Windows Kernel Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2020-0913, CVE-2020-1000, CVE-2020-1003.

Key facts

Published
15 Apr 2020
Last changed
21 Oct 2025
Assigned by
microsoft
KEV added
23 May 2022
KEV fix due
13 Jun 2022
EPSS
4.723% likely to be exploited in the next 30 days, higher than 91.982% of CVEs (scores for 15 Nov 2026)
SSVC (CISA)
Exploitation: active; Automatable: no; Technical impact: total

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

  • 7.8CVSS 3.1, Highfrom CISA (ADP container)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

What to do

  • Apply updates per vendor instructions.CISA KEV required action

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

VendorProductVersions
MicrosoftWindows
  • 10 Version 1803 for 32-bit Systems (affected)
  • 10 Version 1803 for x64-based Systems (affected)
  • 10 Version 1803 for ARM64-based Systems (affected)
  • 10 Version 1809 for 32-bit Systems (affected)
  • 10 Version 1809 for x64-based Systems (affected)
  • 10 Version 1809 for ARM64-based Systems (affected)
  • 10 Version 1709 for 32-bit Systems (affected)
  • 10 Version 1709 for x64-based Systems (affected)
  • 10 Version 1709 for ARM64-based Systems (affected)
  • 10 for 32-bit Systems (affected)
  • 10 for x64-based Systems (affected)
  • 10 Version 1607 for 32-bit Systems (affected)
  • 10 Version 1607 for x64-based Systems (affected)
  • 7 for 32-bit Systems Service Pack 1 (affected)
  • 7 for x64-based Systems Service Pack 1 (affected)
  • 8.1 for 32-bit systems (affected)
  • 8.1 for x64-based systems (affected)
  • RT 8.1 (affected)
MicrosoftWindows Server
  • version 1803 (Core Installation) (affected)
  • 2019 (affected)
  • 2019 (Core installation) (affected)
  • 2016 (affected)
  • 2016 (Core installation) (affected)
  • 2008 for 32-bit Systems Service Pack 2 (affected)
  • 2008 for 32-bit Systems Service Pack 2 (Core installation) (affected)
  • 2008 for Itanium-Based Systems Service Pack 2 (affected)
  • 2008 for x64-based Systems Service Pack 2 (affected)
  • 2008 for x64-based Systems Service Pack 2 (Core installation) (affected)
  • 2008 R2 for Itanium-Based Systems Service Pack 1 (affected)
  • 2008 R2 for x64-based Systems Service Pack 1 (affected)
  • 2008 R2 for x64-based Systems Service Pack 1 (Core installation) (affected)
  • 2012 (affected)
  • 2012 (Core installation) (affected)
  • 2012 R2 (affected)
  • 2012 R2 (Core installation) (affected)
MicrosoftWindows 10 Version 1909 for 32-bit Systems
  • unspecified (affected)
MicrosoftWindows 10 Version 1909 for x64-based Systems
  • unspecified (affected)
MicrosoftWindows 10 Version 1909 for ARM64-based Systems
  • unspecified (affected)
MicrosoftWindows Server, version 1909 (Server Core installation)
  • unspecified (affected)
MicrosoftWindows 10 Version 1903 for 32-bit Systems
  • unspecified (affected)
MicrosoftWindows 10 Version 1903 for x64-based Systems
  • unspecified (affected)
MicrosoftWindows 10 Version 1903 for ARM64-based Systems
  • unspecified (affected)
MicrosoftWindows Server, version 1903 (Server Core installation)
  • unspecified (affected)

Timeline

  1. 15 Apr 2020 Published
  2. 23 May 2022 CVE-2020-1027 added to CISA KEV
  3. 23 May 2022 Added to the CISA KEV catalogue

Weakness

References