CVE-2025-21176: 
vulnerability analysis and mitigation

A remote code execution vulnerability (CVE-2025-21176) was discovered in .NET, .NET Framework, and Visual Studio. The vulnerability was disclosed on January 14, 2025, affecting multiple versions of Microsoft's .NET Framework, .NET, and Visual Studio products across various Windows operating systems (NVD, RedHat).

The vulnerability has been assigned a CVSS v3.1 base score of 8.8 (HIGH), with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. The flaw is categorized as CWE-126 (Buffer Over-read) and allows an attacker to load a specially crafted file in .NET, potentially leading to remote code execution (NVD, RedHat).

The vulnerability poses significant risks with high impacts on confidentiality, integrity, and availability. It requires user interaction but can be exploited remotely without requiring privileges, potentially allowing attackers to execute arbitrary code on affected systems (RedHat).

Updates have been released for affected versions, including .NET 8 (version 8.0.112-8.0.12) and .NET 9 (version 9.0.102-9.0.1). Red Hat recommends updating affected packages as soon as possible, as no practical mitigation has been identified (Ubuntu, RedHat).