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Vulnerability DatabaseCVE-2025-21276

CVE-2025-21276: 
vulnerability analysis and mitigation

Overview

Windows MapUrlToZone Denial of Service Vulnerability (CVE-2025-21276) was discovered and recorded on December 10, 2024, with public disclosure on January 14, 2025. This vulnerability affects multiple versions of Microsoft Windows operating systems, including Windows 10, Windows 11, and various Windows Server editions (CVE MITRE).

Technical details

The vulnerability has been assigned a CVSS score of 8.0, indicating high severity, with attack vector being network-based (AV:N), low attack complexity (AC:L), requiring no authentication (Au:N), and primarily impacting system availability (A:C) (Rapid7).

Impact

This vulnerability primarily affects system availability, potentially allowing attackers to cause denial of service conditions in affected Windows systems (Rapid7).

Mitigation and workarounds

Microsoft has released security updates to address this vulnerability across multiple Windows versions. The fixes are available through various KB patches including KB5050013 for Windows 10 1507, KB5049993 for Windows 10 1607, KB5050008 for Windows 10 1809, KB5049981 for Windows 10 21H2/22H2, KB5050021 for Windows 11 22H2/23H2, and multiple other versions of Windows Server (Rapid7).

Additional resources

Source: This report was generated using AI

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