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CVE-2026-50649

HighCVSS 7.8/10Last modified Oct 28, 2026

Description

Deserialization of untrusted data in .NET allows an unauthorized attacker to execute code locally.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

Affected software

Vendor	Product	Versions
Microsoft	.NET 8.0 runtime	>= 8.0.0, < 8.0.29
Microsoft	.NET 9.0 runtime	>= 9.0.0, < 9.0.18
Microsoft	Microsoft .NET Framework 3.5	>= 3.5.0, < 2.0.50727.9182 & 3.0.30729.9168
Microsoft	Microsoft .NET Framework 3.5 AND 4.7.2	>= 4.7.0, < 2.0.50727.9069 & 3.0.30729.9067 & 4.7.4143.0
Microsoft	Microsoft .NET Framework 3.5 AND 4.8	>= 4.8.0, < 2.0.50727.9069 & 3.0.30729.9067 & 4.8.4803.0
Microsoft	Microsoft .NET Framework 3.5 AND 4.8.1	>= 4.8.1, < 2.0.50727.9182 & 3.0.30729.9168 & 4.8.9339.0
Microsoft	Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2	>= 4.7.0, < 4.7.4143.0
Microsoft	Microsoft .NET Framework 4.8	>= 4.8.0, < 4.8.4803.0
Microsoft	Microsoft .NET Framework 4.8.1	>= 4.8.0.0, < 4.8.9340.0
Microsoft	Microsoft Visual Studio 2026 version 18.7	>= 18.0, < 18.7.4

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50649Patch, Vendor Advisory

Timeline

Published: Jul 14, 2026
Last modified: Oct 28, 2026
NVD status: Analyzed

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CVE-2026-50649: High severity, CVSS 7.8 | Vulnix