CVE-2020-1027: Technical Deep-Dive (Auto Refreshed)

Generated on 2026-03-30T16:04:50.064Z. This file is automatically regenerated every 30 minutes by the CVE AI enrichment job using web sources (NVD, MITRE, CISA KEV, GitHub).

Executive Technical Summary

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.

• Context preserved from previous revision: 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. 1. Use only isolated environments and systems you own or are explicitly authorized to test.

Technical Details

• CVE: CVE-2020-1027
• KEV date added: 2022-05-23
• KEV due date: 2022-06-13
• NVD published: 2020-04-15
• NVD modified: 2025-10-29
• MITRE modified: 2025-10-21
• CVSS base score: 7.8
• CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
• CVSS exploitability score: 1.8
• CVSS impact score: 5.9
• Attack vector: Local
• Attack complexity: Low
• Privileges required: Low
• User interaction: None
• Scope: Unchanged
• Confidentiality impact: High
• Integrity impact: High
• Availability impact: High

Versions and Products Impacted

• microsoft / windows 10 1507
• microsoft / windows 10 1607
• microsoft / windows 10 1709
• microsoft / windows 10 1803
• microsoft / windows 10 1809
• microsoft / windows 10 1903
• 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 (versions: r2)
• microsoft / windows server 2012
• microsoft / windows server 2012 (versions: r2)
• microsoft / windows server 2016
• microsoft / windows server 2019
• Microsoft / Windows (versions: 10 Version 1803 for 32-bit Systems, 10 Version 1803 for x64-based Systems, 10 Version 1803 for ARM64-based Systems, 10 Version 1809 for 32-bit Systems, 10 Version 1809 for x64-based Systems, 10 Version 1809 for ARM64-based Systems, 10 Version 1709 for 32-bit Systems, 10 Version 1709 for x64-based Systems, 10 Version 1709 for ARM64-based Systems, 10 for 32-bit Systems)

Weakness Classification

• CWE-787
• Elevation of Privilege

Repositories for Lab Validation (Public Examples)

• No public repository matched this CVE query in the current run.

People and Organizations Mentioned

• microsoft
• Windows

Practical Defensive Validation (Authorized Only)

1. Use only isolated environments and systems you own or are explicitly authorized to test.
2. Snapshot infrastructure before validation and preserve baseline logs (EDR, SIEM, OS, app).
3. Create low-privilege users on microsoft / windows 10 1507 and validate that patching blocks unauthorized admin-level actions.
4. Compare token/privilege transitions in Windows Event Logs before and after remediation.
5. Tune detections for unusual group membership changes and SYSTEM-level process launches from user sessions.

References

• NVD record: https://nvd.nist.gov/vuln/detail/CVE-2020-1027
• MITRE CVE record: https://www.cve.org/CVERecord?id=CVE-2020-1027
• CISA KEV Catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
• CISA KEV JSON feed: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json
• KEV notes: https://nvd.nist.gov/vuln/detail/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

This content is for defensive security training and authorized validation only.