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 Component Object Model (COM) on Windows 10 Version 1809 (build 10.0.17763.0). It allows an attacker with local privileges to access resources using incompatible types, leading to information disclosure. The CVSS 3.1 base score is 5.5 (medium severity), reflecting local attack vector, low complexity, required privileges, no user interaction, and high impact on confidentiality only. Microsoft has published an official fix for this vulnerability.
Potential Impact
An authorized attacker with local access can exploit this vulnerability to disclose sensitive information from the affected system. There is no impact on integrity or availability. No known exploits are reported in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft 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.
CVSS v3.1
Score 5.5medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-20806) is a type confusion issue (CWE-843) in the Windows Component Object Model (COM) on Windows 10 Version 1809 (build 10.0.17763.0). It allows an attacker with local privileges to access resources using incompatible types, leading to information disclosure. The CVSS 3.1 base score is 5.5 (medium severity), reflecting local attack vector, low complexity, required privileges, no user interaction, and high impact on confidentiality only. Microsoft has published an official fix for this vulnerability.
Potential Impact
An authorized attacker with local access can exploit this vulnerability to disclose sensitive information from the affected system. There is no impact on integrity or availability. No known exploits are reported in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft 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: 04/14/2026, 17:32:04 UTC
Last enriched: 06/19/2026, 16:56:39 UTC
Last updated: 07/31/2026, 19:22:57 UTC
Views: 99
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