CVE-2025-21326: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in Microsoft Windows Server 2022, 23H2 Edition (Server Core installation)
Internet Explorer Remote Code Execution Vulnerability
AI Analysis
Technical Summary
This vulnerability, identified as CVE-2025-21326, is a type confusion issue in Internet Explorer on Windows Server 2022, 23H2 Edition (Server Core installation). It allows an attacker with local access and the ability to trick a user into interacting with malicious content to execute arbitrary code remotely. The CVSS v3.1 score is 7.8, reflecting high impact on confidentiality, integrity, and availability. Microsoft has released an official fix to address this vulnerability.
Potential Impact
Successful exploitation can lead to remote code execution with high impact on confidentiality, integrity, and availability of the affected system. The attacker requires low attack complexity and no privileges but does require user interaction. This could allow an attacker to fully compromise the affected Windows Server 2022 system.
Mitigation Recommendations
An official fix is available from Microsoft. Administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21326 to remediate this vulnerability.
CVE-2025-21326: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in Microsoft Windows Server 2022, 23H2 Edition (Server Core installation)
Description
Internet Explorer Remote Code Execution Vulnerability
CVSS v3.1
Score 7.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CVE-2025-21326, is a type confusion issue in Internet Explorer on Windows Server 2022, 23H2 Edition (Server Core installation). It allows an attacker with local access and the ability to trick a user into interacting with malicious content to execute arbitrary code remotely. The CVSS v3.1 score is 7.8, reflecting high impact on confidentiality, integrity, and availability. Microsoft has released an official fix to address this vulnerability.
Potential Impact
Successful exploitation can lead to remote code execution with high impact on confidentiality, integrity, and availability of the affected system. The attacker requires low attack complexity and no privileges but does require user interaction. This could allow an attacker to fully compromise the affected Windows Server 2022 system.
Mitigation Recommendations
An official fix is available from Microsoft. Administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21326 to remediate this vulnerability.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- microsoft
- Date Reserved
- 2024-12-11T00:29:48.349Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21326","vendor":"Microsoft"}]
Threat ID: 68c0c0d09ed239a66badfd17
Added to database: 09/10/2025, 00:05:36 UTC
Last enriched: 06/10/2026, 09:54:47 UTC
Last updated: 07/08/2026, 10:28:16 UTC
Views: 259
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