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

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00939.

Exploitation none

Automatable no

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Microsoft .NET 8.0 affected
Version Status Constraints
8.0.0 affected < 8.0.29
Microsoft .NET 9.0 affected
Version Status Constraints
9.0.0 affected < 9.0.18
Microsoft Microsoft .NET Framework 3.5 affected
Version Status Constraints
3.5.0 affected < 2.0.50727.9182 & 3.0.30729.9168
Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 affected
Version Status Constraints
4.7.0 affected < 2.0.50727.9069 & 3.0.30729.9067 & 4.7.4143.0
Microsoft Microsoft .NET Framework 3.5 AND 4.8 affected
Version Status Constraints
4.8.0 affected < 2.0.50727.9069 & 3.0.30729.9067 & 4.8.4803.0
Microsoft Microsoft .NET Framework 3.5 AND 4.8.1 affected
Version Status Constraints
4.8.1 affected < 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 affected
Version Status Constraints
4.7.0 affected < 4.7.4143.0
Microsoft Microsoft .NET Framework 4.8 affected
Version Status Constraints
4.8.0 affected < 4.8.4803.0
Microsoft Microsoft .NET Framework 4.8.1 affected
Version Status Constraints
4.8.0.0 affected < 4.8.9340.0
Microsoft Microsoft Visual Studio 2026 version 18.7 affected
Version Status Constraints
18.0 affected < 18.7.4

No data.

Package CPE Advisory Released Date
Red Hat Hardened Images
dotnet9-0-main-9.0.118-1.hum1 cpe:/a:redhat:hummingbird:1 RHSA-2026:27171 2026-06-19T00:00:00Z

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No data.

Project Subscriptions

Vendors Products
Microsoft Subscribe
.net Subscribe
.net Framework Subscribe
Visual Studio 2026 Subscribe
Redhat Subscribe
Hummingbird Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50649 cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-50649 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-50649 cve-icon
History

Wed, 22 Jul 2026 16:00:00 +0000

Type Values Removed Values Added
First Time appeared Microsoft .net Framework
CPEs cpe:2.3:a:microsoft:.net_framework:*:*:*:*:*:*:*:*
Vendors & Products Microsoft .net Framework

Sat, 18 Jul 2026 12:15:00 +0000

Type Values Removed Values Added
First Time appeared Redhat
Redhat hummingbird
CPEs cpe:/a:redhat:hummingbird:1
Vendors & Products Redhat
Redhat hummingbird
References
Metrics threat_severity

None

 threat_severity

Important

Wed, 15 Jul 2026 22:45:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*
Vendors & Products Microsoft visual Studio 2022

Wed, 15 Jul 2026 11:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Tue, 14 Jul 2026 19:45:00 +0000

Type Values Removed Values Added
Description Deserialization of untrusted data in .NET allows an unauthorized attacker to execute code locally.
Title .NET Remote Code Execution Vulnerability
First Time appeared Microsoft
Microsoft .net
Microsoft visual Studio 2022
Microsoft visual Studio 2026
Weaknesses CWE-502
CPEs cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft .net
Microsoft visual Studio 2022
Microsoft visual Studio 2026
References
Metrics cvssV3_1

{'score': 7.8, 'vector': '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-07-24T14:34:31.628Z

Reserved: 2026-06-05T14:33:50.830Z

Link: CVE-2026-50649

cve-icon Vulnrichment

Updated: 2026-07-15T11:00:39.975Z

cve-icon NVD

No data.

cve-icon Redhat

Severity : Important

Publid Date: 2026-07-14T19:29:57Z

Links: CVE-2026-50649 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-07-22T22:00:05Z

Weaknesses