CVE-2020-1027

An elevation of privilege vulnerability exists in the way that the Windows Kernel handles objects...

7.8 HighIn KEV

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.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

4.72%Up 0.2 points since Apr 14, 2021

What each source reports

NVD Score used 7.8

Record: CVE-2020-1027
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.2 HighAV:L/AC:L/Au:N/C:C/I:C/A:C
Weakness: CWE-787
Updated: 2026-11-02

CVE List 7.8

Record: CVE-2020-1027
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-787
Updated: 2026-11-02

EUVDEUVD-2020-11922 7.8

Record: EUVD-2020-11922
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-4425-fxh6-87fr 7.8

An elevation of privilege vulnerability exists in the way that the Windows Kernel handles objects...

Record: GHSA-4425-fxh6-87fr
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-269, CWE-787
Updated: 2026-11-02

CISA KEV No score

Microsoft Windows Kernel Privilege Escalation Vulnerability

An elevation of privilege vulnerability exists in the way that the Windows Kernel handles objects in memory. An attacker who successfully exploited the vulnerability could execute code with elevated permissions.

Record: CVE-2020-1027
Weakness: CWE-787
Updated: 2026-11-02

Affected products

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History

History
Recorded	Changed	Sources
Nov 3, 2026	exploitation
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, CISA KEV, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-1027 is a high vulnerability (CVSS 7.8) in Microsoft Windows, published April 15, 2020. CISA lists it as known to be exploited, since May 23, 2022. EUVD reports exploitation since May 23, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 4.72%, the 91st percentile. No source names a fixed version.