CVE-2026-45641: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in Microsoft Windows 10 Version 21H2
Out-of-bounds read in Windows Hyper-V allows an unauthorized attacker to execute code locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-45641) is classified as CWE-843 (Access of Resource Using Incompatible Type, or Type Confusion) and affects Windows 10 Version 21H2 (build 10.0.19044.0). It arises from an out-of-bounds read in the Windows Hyper-V component, which could be exploited by an unauthorized attacker to execute code locally. The CVSS v3.1 base score is 8.4, indicating high severity, with attack vector local, low attack complexity, no privileges required, and no user interaction needed. Microsoft has published an official fix for this vulnerability, as detailed in their security advisory.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker with local access to execute arbitrary code with elevated privileges on the affected Windows 10 system. This could lead to full compromise of the system's confidentiality, integrity, and availability.
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
Out-of-bounds read in Windows Hyper-V allows an unauthorized attacker to execute code locally.
CVSS v3.1
Score 8.4high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-45641) is classified as CWE-843 (Access of Resource Using Incompatible Type, or Type Confusion) and affects Windows 10 Version 21H2 (build 10.0.19044.0). It arises from an out-of-bounds read in the Windows Hyper-V component, which could be exploited by an unauthorized attacker to execute code locally. The CVSS v3.1 base score is 8.4, indicating high severity, with attack vector local, low attack complexity, no privileges required, and no user interaction needed. Microsoft has published an official fix for this vulnerability, as detailed in their security advisory.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker with local access to execute arbitrary code with elevated privileges on the affected Windows 10 system. This could lead to full compromise of the system's confidentiality, integrity, and availability.
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: 6/9/2026, 5:27:03 PM
Last enriched: 6/9/2026, 6:41:01 PM
Last updated: 6/10/2026, 5:10:29 AM
Views: 2
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