Is CVE-2020-1027 being actively exploited?

Yes. CVE-2020-1027 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added on May 23, 2022.

What is the CVSS score for CVE-2020-1027?

CVE-2020-1027 has a CVSS 3.1 base score of 7.8 (HIGH).

CVE-2020-1027

HIGH · CVSS 7.8CISA KEV: actively exploitedEPSS 4.5%EU EUVD: exploited

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

CVSS score: 7.8 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-787
EPSS score: 4.5% (91th percentile)
In CISA KEV: Yes, added May 23, 2022
In EU EUVD: Yes (EUVD-2020-11922)
Published: April 15, 2020
NVD last modified: June 17, 2026
Status: Analyzed

CISA Known Exploited Vulnerability

Microsoft Windows Kernel Privilege Escalation Vulnerability

Added to the KEV catalog on May 23, 2022; federal remediation due June 13, 2022.

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2020-11922 in the EU Vulnerability Database. ENISA flags it as known exploited. Last updated in EUVD on October 21, 2025.

View on the EU Vulnerability Database

Affected products

microsoft / windows 10 1507
microsoft / windows 10 1507
microsoft / windows 10 1607
microsoft / windows 10 1607
microsoft / windows 10 1709
microsoft / windows 10 1709
microsoft / windows 10 1709
microsoft / windows 10 1803
microsoft / windows 10 1803
microsoft / windows 10 1803
microsoft / windows 10 1809
microsoft / windows 10 1809
microsoft / windows 10 1809
microsoft / windows 10 1903
microsoft / windows 10 1903
microsoft / windows 10 1903
microsoft / windows 10 1909
microsoft / windows 10 1909
microsoft / windows 10 1909
microsoft / windows 7
microsoft / windows 8.1
microsoft / windows rt 8.1
microsoft / windows server 1803
microsoft / windows server 1903
microsoft / windows server 1909
microsoft / windows server 2008
microsoft / windows server 2008
microsoft / windows server 2008
microsoft / windows server 2012
microsoft / windows server 2012
microsoft / windows server 2016
microsoft / windows server 2019

Certified products that may be affected

2 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Windows 7 BitLocker™ Drive Encryption - Microsoft Corporation - FIPS 140 1332 - historical
Microsoft Windows 7 Kernel Mode Cryptographic Primitives Library (cng.sys) - Microsoft Corporation - FIPS 140 1328 - historical

References

http://packetstormsecurity.com/files/168068/Windows-sxs-CNodeFactory-XMLParser_Element_doc_assembly_assemblyIdentity-Heap-Buffer-Overflow.html(Exploit, Third Party Advisory, VDB Entry)
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1027(Patch, Vendor Advisory)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1027(US Government Resource)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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