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CVE-2026-62871

HighCVSS 7.8/10Last modified Oct 28, 2026

Description

Out-of-bounds write 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

CWE-122 CWE-787

Affected software

Vendor	Product	Versions
Microsoft	.NET 8.0 runtime	>= 8.0.0, < 8.0.30
Microsoft	.NET 9.0 runtime	>= 9.0.0, < 9.0.19
Microsoft	Microsoft Visual Studio 2022 version 17.14	>= 17.14.0, < 17.14.38
Microsoft	Microsoft Visual Studio 2026 version 18.8	>= 18.0, < 18.8.3

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62871Patch, Vendor Advisory

Timeline

Published: Aug 11, 2026
Last modified: Oct 28, 2026
NVD status: Analyzed

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CVE-2026-62871: High severity, CVSS 7.8 | Vulnix