CVE-2026-62886

.NET Elevation of Privilege Vulnerability

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

Description

Integer overflow or wraparound in .NET allows an unauthorized attacker to elevate privileges 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-190 Integer Overflow or Wraparound
CWE-122 Heap-based Buffer Overflow

Affected Products

Product	Versions
Microsoft .NET Framework 3.5Microsoft	3.5.0 to before 2.0.50727.8987 AND 3.0.30729.8982Affected
Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2Microsoft	3.0.0.0 to before 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0Affected
Microsoft .NET Framework 3.5 AND 4.7.2Microsoft	4.7.0 to before 2.0.50727.9070 & 3.0.30729.9068 & 4.7.4145.0Affected
Microsoft .NET Framework 3.5 AND 4.8Microsoft	4.8.0 to before 2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0Affected
Microsoft .NET Framework 3.5 AND 4.8.1Microsoft	4.8.1 to before 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0Affected
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2Microsoft	4.7.0 to before 4.7.4145.0Affected
Microsoft .NET Framework 4.8Microsoft	4.8.0 to before 4.8.4806.0Affected
Microsoft .NET Framework 4.8.1Microsoft	4.8.0.0 to before 4.8.9347.0Affected
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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