CVE-2025-55248: Microsoft .net

Medium severity, CVSS 5.7. EPSS: 0.7% chance of exploitation in the next 30 days.

Inadequate encryption strength in .NET, .NET Framework, Visual Studio allows an authorized attacker to disclose information over a network.

Affected products

• Microsoft .net: from 8.0.0, before 8.0.21 (fixed in 8.0.21); from 9.0.0, before 9.0.10 (fixed in 9.0.10)
• Microsoft .NET Framework: version 4.6.2 only; version 4.7 only; version 4.7.1 only; version 4.7.2 only; version 3.5.1 only; version 3.5 only; …
• Microsoft Visual Studio 2022: from 17.10.0, before 17.10.20 (fixed in 17.10.20); from 17.12.0, before 17.12.13 (fixed in 17.12.13); from 17.14.0, before 17.14.17 (fixed in 17.14.17)

Published 2025-10-14. Last modified 2026-06-17.