CVE-2026-20806: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in Microsoft Windows 10 Version 1809
Access of resource using incompatible type ('type confusion') in Windows COM allows an authorized attacker to disclose information locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-20806) is a type confusion issue (CWE-843) in the Windows COM subsystem of Windows 10 Version 1809 (build 10.0.17763.0). It allows an authorized local attacker with low privileges to disclose sensitive information by accessing resources using incompatible types. The CVSS v3.1 base score is 5.5, reflecting a medium severity with high confidentiality impact but no integrity or availability impact. Microsoft has released an official fix to address this issue.
Potential Impact
Successful exploitation can lead to local information disclosure, compromising confidentiality. There is no impact on system integrity or availability. The attacker must have some level of authorization on the affected system, and no user interaction is required.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20806 to remediate this vulnerability.
CVE-2026-20806: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in Microsoft Windows 10 Version 1809
Description
Access of resource using incompatible type ('type confusion') in Windows COM allows an authorized attacker to disclose information locally.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-20806) is a type confusion issue (CWE-843) in the Windows COM subsystem of Windows 10 Version 1809 (build 10.0.17763.0). It allows an authorized local attacker with low privileges to disclose sensitive information by accessing resources using incompatible types. The CVSS v3.1 base score is 5.5, reflecting a medium severity with high confidentiality impact but no integrity or availability impact. Microsoft has released an official fix to address this issue.
Potential Impact
Successful exploitation can lead to local information disclosure, compromising confidentiality. There is no impact on system integrity or availability. The attacker must have some level of authorization on the affected system, and no user interaction is required.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20806 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-03T05:54:20.371Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20806","vendor":"Microsoft"}]
Threat ID: 69de7a1482d89c981fd6a5e0
Added to database: 4/14/2026, 5:32:04 PM
Last enriched: 4/14/2026, 7:33:43 PM
Last updated: 4/15/2026, 6:07:03 AM
Views: 3
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