CVE-2026-45641: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in Microsoft Windows 10 Version 21H2
Access of resource using incompatible type ('type confusion') in Windows Hyper-V allows an unauthorized attacker to execute code locally.
AI Analysis
Technical Summary
This vulnerability, identified as CWE-843 (Access of Resource Using Incompatible Type or 'Type Confusion'), affects Windows Hyper-V on Windows 10 Version 21H2 (build 10.0.19044.0). It enables an unauthorized local attacker to execute arbitrary code due to improper handling of resource types. The CVSS v3.1 base score is 8.4, indicating high impact on confidentiality, integrity, and availability. Microsoft has published an official fix to remediate this vulnerability.
Potential Impact
Successful exploitation allows an attacker with local access to execute arbitrary code on the affected system, potentially leading to full system compromise. The vulnerability impacts confidentiality, integrity, and availability of the system. 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-2026-45641 to remediate this vulnerability.
CVE-2026-45641: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in Microsoft Windows 10 Version 21H2
Description
Access of resource using incompatible type ('type confusion') in Windows Hyper-V allows an unauthorized attacker to execute code locally.
CVSS v3.1
Score 8.4high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CWE-843 (Access of Resource Using Incompatible Type or 'Type Confusion'), affects Windows Hyper-V on Windows 10 Version 21H2 (build 10.0.19044.0). It enables an unauthorized local attacker to execute arbitrary code due to improper handling of resource types. The CVSS v3.1 base score is 8.4, indicating high impact on confidentiality, integrity, and availability. Microsoft has published an official fix to remediate this vulnerability.
Potential Impact
Successful exploitation allows an attacker with local access to execute arbitrary code on the affected system, potentially leading to full system compromise. The vulnerability impacts confidentiality, integrity, and availability of the system. 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-2026-45641 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-05-12T20:33:35.156Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45641","vendor":"Microsoft"}]
Threat ID: 6a284ce78dd33fbd85664ed2
Added to database: 06/09/2026, 17:27:03 UTC
Last enriched: 07/29/2026, 22:01:50 UTC
Last updated: 07/31/2026, 21:26:44 UTC
Views: 75
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