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 involves a type confusion issue (CWE-843) in the Windows Component Object Model (COM) on Windows 10 Version 1809 (build 10.0.17763.0). An authorized attacker with local access and low privileges can exploit this flaw to disclose sensitive information by accessing resources using incompatible types. The vulnerability does not allow privilege escalation or denial of service but impacts confidentiality. Microsoft has published an official fix to address this issue.
Potential Impact
Successful exploitation allows an authorized local attacker to disclose sensitive information due to improper handling of resource types in Windows COM. The integrity and availability of the system are not affected. No known active exploits have been reported.
Mitigation Recommendations
An official fix from Microsoft is available and should be applied to affected Windows 10 Version 1809 systems. Refer to the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20806 for patch details and deployment guidance.
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
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a type confusion issue (CWE-843) in the Windows Component Object Model (COM) on Windows 10 Version 1809 (build 10.0.17763.0). An authorized attacker with local access and low privileges can exploit this flaw to disclose sensitive information by accessing resources using incompatible types. The vulnerability does not allow privilege escalation or denial of service but impacts confidentiality. Microsoft has published an official fix to address this issue.
Potential Impact
Successful exploitation allows an authorized local attacker to disclose sensitive information due to improper handling of resource types in Windows COM. The integrity and availability of the system are not affected. No known active exploits have been reported.
Mitigation Recommendations
An official fix from Microsoft is available and should be applied to affected Windows 10 Version 1809 systems. Refer to the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20806 for patch details and deployment guidance.
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: 5/19/2026, 10:31:37 AM
Last updated: 5/30/2026, 10:37:42 AM
Views: 49
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.