CVE-2026-50646

.NET Framework Remote Code Execution Vulnerability

State: Published
Severity: 7.8 High
Published: Jul 14, 2026
Updated: Nov 1, 2026
Reserved: Jun 5, 2026

Description

Protection mechanism failure in .NET Framework allows an unauthorized attacker to execute code locally.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-693 Protection Mechanism Failure
CWE-502 Deserialization of Untrusted Data

Affected Products

Product	Versions
.NET 8.0 runtimeMicrosoft	8.0.0 to before 8.0.29Affected
.NET 9.0 runtimeMicrosoft	9.0.0 to before 9.0.18Affected
Microsoft .NET Framework 3.5Microsoft	3.5.0 to before 2.0.50727.8983 & 3.0.30729.8978Affected
Microsoft .NET Framework 3.5 AND 4.7.2Microsoft	4.7.0 to before 2.0.50727.8983 & 3.0.30729.8978 & 4.7.4143.0Affected
Microsoft .NET Framework 3.5 AND 4.8Microsoft	4.8.0 to before 2.0.50727.9069 & 3.0.30729.9067 & 4.8.4803.0Affected
Microsoft .NET Framework 3.5 AND 4.8.1Microsoft	4.8.1 to before 2.0.50727.9182 & 3.0.30729.9168 & 4.8.9339.0Affected
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2Microsoft	4.7.0 to before 4.7.4143.0Affected
Microsoft .NET Framework 4.8Microsoft	4.8.0 to before 4.8.4803.0Affected
Microsoft Visual Studio 2022 version 17.12Microsoft	17.12.0 to before 17.12.22Affected
Microsoft Visual Studio 2022 version 17.14Microsoft	17.14.0 to before 17.14.36Affected
Microsoft Visual Studio 2026 version 18.7Microsoft	18.0 to before 18.7.4Affected

References

.NET Framework Remote Code Execution Vulnerabilityvendor-advisorypatch

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