CVE-2026-50646

Analyzed Analyzed - Analysis Complete

Protection mechanism failure in .NET Framework allows local code execution

Publication date: 2026-07-14

Last updated on: 2026-07-24

Assigner: Microsoft Corporation

Description

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

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-07-14

Last Modified

2026-07-24

Generated

2026-08-04

AI Q&A

2026-07-15

EPSS Evaluated

2026-08-02

NVD

CVE-2026-50646

EUVD

EUVD-2026-44397

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	.net_framework	4.8
microsoft	.net_framework	4.6.2
microsoft	.net_framework	4.7
microsoft	.net_framework	4.7.1
microsoft	.net_framework	4.7.2
microsoft	.net_framework	3.5
microsoft	.net_framework	4.8.1
microsoft	.net	From 8.0.0 (inc) to 8.0.29 (exc)
microsoft	.net	From 9.0.0 (inc) to 9.0.18 (exc)
microsoft	visual_studio_2022	From 17.12.0 (inc) to 17.12.22 (exc)
microsoft	visual_studio_2022	From 17.14.0 (inc) to 17.14.36 (exc)
microsoft	visual_studio_2026	From 18.7.0 (inc) to 18.7.4 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-693	The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.
CWE-502	The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Attack-Flow Graph

Executive Summary

CVE-2026-50646 is a vulnerability in the .NET Framework where a protection mechanism fails. This failure allows an unauthorized attacker to execute code locally on the affected system.

The vulnerability is classified as a remote code execution (RCE) issue with a severity rating of 'Important'. The CVSS v3.1 base score is 7.8, indicating a high impact on confidentiality, integrity, and availability.

The attack vector is local (AV:L), meaning the attacker must have access to the system, and the attack complexity is low (AC:L). No privileges are required (PR:N), but user interaction is needed (UI:R).

Impact Analysis

If exploited, this vulnerability could allow an attacker to execute arbitrary code on your system with the same privileges as the user who triggered the vulnerability.

Unauthorized access to sensitive data stored or processed by .NET Framework applications.
Modification or deletion of critical files or configurations on the affected system.
Installation of malware or other malicious software, leading to further compromise of the system or network.

Since the vulnerability requires local access and user interaction, the risk is higher in environments where users may be tricked into executing malicious files or actions.

Compliance Impact

This vulnerability could impact compliance with several standards and regulations, depending on the context of its exploitation.

GDPR: If the vulnerability leads to unauthorized access or disclosure of personal data, it could result in a violation of GDPR requirements for data protection and breach notification.
HIPAA: For organizations handling protected health information (PHI), exploitation of this vulnerability could lead to unauthorized access or modification of PHI, violating HIPAA's security and privacy rules.
Other standards like ISO 27001 or NIST frameworks may also be affected if the vulnerability undermines security controls related to access management, data integrity, or incident response.

Failure to patch or mitigate this vulnerability could be seen as a lapse in due diligence, potentially leading to non-compliance penalties or legal liabilities.

Mitigation Strategies

Apply the latest security updates provided by Microsoft for the .NET Framework to mitigate this vulnerability.

Refer to the official Microsoft update guide for CVE-2026-50646 to obtain the necessary patches and instructions.

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