May 2026: .NET Elevation of Privilege Vulnerability
CVE-2026-32177 Published on May 12, 2026

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

Vendor Advisory NVD

Weakness Types

Heap-based Buffer Overflow

A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Products Associated with CVE-2026-32177

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Microsoft Net

Microsoft Visual Studio 2017

Microsoft Visual Studio 2019

Microsoft Visual Studio 2022

Microsoft Visual Studio 2026

Affected Versions

Microsoft .NET 10.0:

Version 10.0.0 and below 10.0.8 is affected.

Microsoft .NET 8.0:

Version 8.0.0 and below 8.0.27 is affected.

Microsoft .NET 9.0:

Version 9.0.0 and below 9.0.16 is affected.

Microsoft .NET Framework 3.5:

Version 3.5.0 and below 4.8.9334.0 and 4.8.4802.0 is affected.

Microsoft .NET Framework 3.5 AND 4.7.2:

Version 4.7.0 and below 4.8.9334.0 and 4.8.4802.0 is affected.

Microsoft .NET Framework 3.5 AND 4.8:

Version 4.8.0 and below 4.8.9334.0 and 4.8.4802.0 is affected.

Microsoft .NET Framework 3.5 AND 4.8.1:

Version 4.8.1 and below 4.8.9334.0 and 4.8.4802.0 is affected.

Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2:

Version 4.7.0 and below 4.8.9334.0 and 4.8.4802.0 is affected.

Microsoft .NET Framework 4.8:

Version 4.8.0 and below 4.8.9334.0 and 4.8.4802.0 is affected.

Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8):

Version 15.9.0 and below 15.9.80 is affected.

Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10):

Version 16.11.0 and below 16.11.56 is affected.

Microsoft Visual Studio 2022 version 17.12:

Version 17.12.0 and below 17.12.20 is affected.

Microsoft Visual Studio 2022 version 17.14:

Version 17.14.0 and below 17.14.31 is affected.

Microsoft Visual Studio 2026 version 18.5: