CVE-2026-32177 .NET Elevation of Privilege Vulnerability
A heap-based buffer overflow in the .NET runtime allows local attackers to elevate privileges.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-32177?
CVE-2026-32177 is a high-severity memory corruption vulnerability in Microsoft .Net, published on 12 May 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Heap-based buffer overflow in .NET allows an unauthorized attacker to elevate privileges locally.
Which versions are affected by CVE-2026-32177?
2 open source packages ship an affected version, including dotnet and dotnet-sdk. It affects 4 products.
| Package | Affected | Fixed in |
|---|---|---|
dotnet Bitnami | From 8.0.0 | 8.0.27, 9.0.16, 10.0.8 |
dotnet-sdk Bitnami | From 8.0.0 | 8.0.27, 9.0.16, 10.0.8 |
Products include Microsoft .Net, Microsoft .Net Framework, Microsoft Visual Studio 2022, Microsoft Visual Studio 2026.
How do I fix CVE-2026-32177?
Upgrade dotnet to a fixed version for your release line: 8.0.27, 9.0.16 or 10.0.8.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-32177 being exploited?
There is no known exploitation of CVE-2026-32177 in the wild and no public exploit code.
Other vulnerabilities in Microsoft .Net
- CVE-2024-43498 .NET and Visual Studio Remote Code Execution Vulnerability
- CVE-2024-0057 NET, .NET Framework, and Visual Studio Security Feature Bypass Vulnerability
- CVE-2026-96957 .NET Security Feature Bypass Vulnerability
- CVE-2026-69439 .NET and Visual Studio Elevation of Privilege Vulnerability
- CVE-2026-71328 .NET and Visual Studio Remote Code Execution Vulnerability
Sources
Also known as BELL-CVE-2026-32177, BIT-dotnet-2026-32177, BIT-dotnet-sdk-2026-32177, MINI-g6p2-h2gc-7r5j, MINI-hc83-669x-cmxm, UBUNTU-CVE-2026-32177.