Code Execution Vulnerability in .NET by Microsoft
CVE-2026-62871

7.8HIGH

Key Information:

Vendor

Microsoft
Status
.net 8.0
.net 9.0
Microsoft Visual Studio 2022 Version 17.14
Microsoft Visual Studio 2026 Version 18.8
Vendor
CVE Published:
11 August 2026

What is CVE-2026-62871?

An out-of-bounds write vulnerability in .NET can be exploited by unauthorized attackers to execute arbitrary code locally on affected systems, potentially leading to unauthorized access and compromise of sensitive information. Proper patching and updates are essential to mitigate this risk.

Affected Version(s)

.NET 8.0 8.0.0 < 8.0.30

.NET 9.0 9.0.0 < 9.0.19

Microsoft Visual Studio 2022 version 17.14 17.14.0 < 17.14.38

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.