CVE-2026-32177: Microsoft .net

High severity, CVSS 7.3. EPSS: 0.6% chance of exploitation in the next 30 days.

Heap-based buffer overflow in .NET allows an unauthorized attacker to elevate privileges locally.

Affected products

• Microsoft .net: from 8.0.0, before 8.0.27 (fixed in 8.0.27); from 9.0.0, before 9.0.16 (fixed in 9.0.16); from 10.0.0, before 10.0.8 (fixed in 10.0.8)
• Microsoft .NET Framework: version 4.8 only; version 4.6.2 only; version 4.7 only; version 4.7.1 only; version 4.7.2 only; version 3.5 only; …
• Microsoft Visual Studio 2022: from 17.12.0, before 17.12.20 (fixed in 17.12.20); from 17.14.0, before 17.14.32 (fixed in 17.14.32)
• Microsoft Visual Studio 2026: from 18.5.0, before 18.5.3 (fixed in 18.5.3)

Published 2026-05-12. Last modified 2026-07-15.