CVE-2020-1027
Published 2020-04-15 · Updated 2026-06-17 · Source secure@microsoft.com
Summary
CVE-2020-1027 is a high-severity (CVSS 7.8) vulnerability in Microsoft Windows. CISA added it to the Known Exploited Vulnerabilities catalog on May 23, 2022, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by June 13, 2022. CISA does not currently list it as used in ransomware campaigns. Microsoft has 390 vulnerabilities in the KEV catalog, 117 of them linked to ransomware.
All 390 known-exploited Microsoft vulnerabilities →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.
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA Known-Exploited Vulnerability
Product: Microsoft — Windows
Name: Microsoft Windows Kernel Privilege Escalation Vulnerability
Date added: 2022-05-23 · Due: 2022-06-13
Required action: Apply updates per vendor instructions.
References
- http://packetstormsecurity.com/files/168068/Windows-sxs-CNodeFactory-XMLParser_Element_doc_assembly_assemblyIdentity-Heap-Buffer-Overflow.html
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1027
- http://packetstormsecurity.com/files/168068/Windows-sxs-CNodeFactory-XMLParser_Element_doc_assembly_assemblyIdentity-Heap-Buffer-Overflow.html
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1027
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1027