CVE-2026-35433: Microsoft Security Advisory CVE-2026-35433 – .NET Elevation of Privilege Vulnerability

Executive Summary: Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 8.0, .NET 9.0, and .NET 10.0. This advisory also provides guidance on what developers can do to updat…

7.3CVSS Score

HIGHSeverity

NOCISA KEV

VulnerabilityImpact Type

📋 Vulnerability Details

CVE ID	CVE-2026-35433
Vendor	nuget
Affected Product	Microsoft.WindowsDesktop.App.Runtime.win-arm64
Vulnerability Type	Vulnerability
CVSS Score	7.3 (HIGH)
Actively Exploited	❌ No known exploitation
Patch Status	See Vendor Advisory →
Reported By	CYBERDUDEBIVASH SENTINEL APEX Intelligence (via github_advisories)

🔬 Technical Analysis

Executive Summary: Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 8.0, .NET 9.0, and .NET 10.0. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. Improper input validation in .NET allows an unauthorized attacker to elevate privileges locally.

Announcement Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/398

CVSS Details - Version: 3.1

• Severity: High

• Score: 7.3

• Vector: AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L/E:U/RL:O/RC:C - Weakness: CWE-122: Heap-based Buffer Overflow, CWE-20: Improper Input Validation

Affected Platforms - Platforms: Windows

• Architectures: All

Affected Packages

🎯 Known Indicators of Compromise

{"type":"url","value":"https://github.com/dotnet/announcements/issues/398","confidence_score":0.82,"first_seen":"2026-05-18","source_count":1}

📚 Advisory References

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