CVE-2025-21270: 
vulnerability analysis and mitigation

Microsoft Message Queuing (MSMQ) Denial of Service Vulnerability (CVE-2025-21270) was disclosed on January 14, 2025. This vulnerability affects multiple versions of Microsoft Windows operating systems, including Windows 10, Windows 11, and various Windows Server editions (NVD).

The vulnerability has been assigned a CVSS v3.1 base score of 7.5 (HIGH) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. The weakness has been categorized under CWE-400 (Uncontrolled Resource Consumption) by Microsoft Corporation (NVD).

This vulnerability specifically affects the availability of the system, as indicated by the CVSS metrics showing high impact on availability (A:H) while having no impact on confidentiality (C:N) or integrity (I:N). The vulnerability can be exploited to cause a denial of service condition in the Microsoft Message Queuing (MSMQ) service (NVD).

Microsoft has released security updates to address this vulnerability. Multiple KB articles have been published for different affected versions, including KB5050013 for Windows 10 1507, KB5049993 for Windows 10 1607, and various other patches for different Windows versions (Rapid7).