CVE-2026-62871

.NET Elevation of Privilege Vulnerability

State: Published
Severity: 7.8 High
Published: Aug 11, 2026
Updated: Oct 30, 2026
Reserved: Jul 14, 2026

Description

Out-of-bounds write in .NET allows an unauthorized attacker to execute code locally.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	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	microsoft

Weaknesses

CWE-787 Out-of-bounds Write
CWE-122 Heap-based Buffer Overflow

Affected Products

Product	Versions
.NET 8.0 runtimeMicrosoft	8.0.0 to before 8.0.30Affected
.NET 9.0 runtimeMicrosoft	9.0.0 to before 9.0.19Affected
Microsoft Visual Studio 2022 version 17.14Microsoft	17.14.0 to before 17.14.38Affected
Microsoft Visual Studio 2026 version 18.8Microsoft	18.0 to before 18.8.3Affected

References

.NET Elevation of Privilege Vulnerabilityvendor-advisorypatch

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