CVE-2026-50649 .NET Remote Code Execution Vulnerability
An attacker can execute arbitrary code locally by exploiting unsafe deserialization in the .NET runtime.
- 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-2026-50649?
CVE-2026-50649 is a high-severity unsafe deserialization vulnerability in Microsoft .Net, published on 14 Jul 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
Deserialization of untrusted data in .NET allows an unauthorized attacker to execute code locally.
Weakness: CWE-502
Which versions are affected by CVE-2026-50649?
2 open source packages ship an affected version, including dotnet and dotnet-sdk. It affects 3 products.
| Package | Affected | Fixed in |
|---|---|---|
dotnet Bitnami | From 8.0.0 | 8.0.29, 9.0.18 |
dotnet-sdk Bitnami | From 8.0.0 | 8.0.29, 9.0.18 |
Products include Microsoft .Net, Microsoft .Net Framework, Microsoft Visual Studio 2026.
How do I fix CVE-2026-50649?
Upgrade dotnet to a fixed version for your release line: 8.0.29 or 9.0.18.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-50649 being exploited?
There is no known exploitation of CVE-2026-50649 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 BIT-dotnet-2026-50649, BIT-dotnet-sdk-2026-50649, MINI-28wj-p962-gp8m, MINI-fxv5-9wfj-ccr5, UBUNTU-CVE-2026-50649.