CVE-2025-55248: 
C# vulnerability analysis and mitigation

Inadequate encryption strength vulnerability (CVE-2025-55248) affects Microsoft's .NET, .NET Framework, and Visual Studio products. The vulnerability was disclosed on October 14, 2025, impacting multiple versions of these products across various operating systems including Windows Server, Windows 10, Windows 11, Linux, and macOS (NVD).

The vulnerability is classified as CWE-326 (Inadequate Encryption Strength) with a CVSS v3.1 base score of 5.7 (MEDIUM) according to NIST, while Microsoft assessed it at 4.8 (MEDIUM). The vulnerability vector is CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N, indicating network vector attack with low attack complexity, requiring low privileges and user interaction (NVD).

The vulnerability allows an authorized attacker to disclose information over a network. The confidentiality impact is rated as High, while there are no integrity or availability impacts (NVD).

Security updates have been released for affected versions. For .NET 8.0, versions up to 8.0.21 have been patched, and for .NET 9.0, versions up to 9.0.10 have been fixed. Visual Studio 2022 has received patches for versions 17.10.20, 17.12.13, and 17.14.17 (Ubuntu Security).