CVE-2026-71328: Microsoft .net

High severity, CVSS 8.8. EPSS: 0.8% chance of exploitation in the next 30 days.

Heap-based buffer overflow in Visual Studio allows an unauthorized attacker to execute code over a network.

Affected products

• Microsoft .net: from 8.0.0, before 8.0.31 (fixed in 8.0.31); from 9.0.0, before 9.0.20 (fixed in 9.0.20); from 10.0.0, before 10.0.12 (fixed in 10.0.12); version 11.0.0 only
• Microsoft Visual Studio 2022: from 17.14.0, before 17.14.40 (fixed in 17.14.40)
• Microsoft Visual Studio 2026: from 18.9.0, before 18.9.3 (fixed in 18.9.3)

Published 2026-09-08. Last modified 2026-09-11.