Improper encoding or escaping of output in .NET allows an authorized attacker to perform spoofing over a network.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00415.

Exploitation none

Automatable no

Technical Impact partial

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 10.0 affected
Version Status Constraints
10.0.0 affected < 10.0.6
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 < 2.0.50727.8983 & 3.0.30729.8978
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 Visual Studio 2022 version 17.12 affected
Version Status Constraints
17.12.0 affected < 17.12.22
Microsoft Microsoft Visual Studio 2022 version 17.14 affected
Version Status Constraints
17.14.0 affected < 17.14.36
Microsoft Microsoft Visual Studio 2026 version 18.7 affected
Version Status Constraints
18.0 affected < 18.7.4

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

No data.

Project Subscriptions

Vendors Products
Microsoft Subscribe
.net Subscribe
Visual Studio 2022 Subscribe
Visual Studio 2026 Subscribe
Advisories
Source ID Title
Ubuntu USN Ubuntu USN USN-8553-1 .NET vulnerabilities
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-2026-50659 cve-icon
History

Tue, 14 Jul 2026 22:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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

Tue, 14 Jul 2026 20:00:00 +0000

Type Values Removed Values Added
Description Improper encoding or escaping of output in .NET allows an authorized attacker to perform spoofing over a network.
Title .NET Spoofing Vulnerability
First Time appeared Microsoft
Microsoft .net
Microsoft visual Studio 2022
Microsoft visual Studio 2026
Weaknesses CWE-116
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': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C'}

Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-07-15T22:25:54.274Z

Reserved: 2026-06-05T14:33:50.831Z

Link: CVE-2026-50659

cve-icon Vulnrichment

Updated: 2026-07-14T20:39:40.283Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-16T02:30:16Z

Weaknesses