Search threats, CVEs… ⌘K
Back to vendor advisories
Microsoft Security Response CenterCVE-2026-35433

.NET Elevation of Privilege Vulnerability

HighVendor CVSS 7.3 / 10 1 CVE Published May 12, 2026 at 7:00 AM UTC
Get alerts for NET 10.0 installed on Windows

Summary

Improper input validation in .NET allows an unauthorized attacker to elevate privileges locally.

Products covered

  • .NET 10.0 installed on Windows

  • .NET 8.0 installed on Windows

  • .NET 9.0 installed on Windows

  • Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems

  • Microsoft .NET Framework 4.8 on Windows Server 2016

  • Microsoft .NET Framework 4.8 on Windows Server 2012

  • Microsoft .NET Framework 4.8 on Windows Server 2012 R2

  • Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based Systems

Show 22 more products

  • Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for ARM64-based Systems

  • Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022

  • Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2 for ARM64-based Systems

  • Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2 for x64-based Systems

  • Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for x64-based Systems

  • Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for ARM64-based Systems

  • Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for x64-based Systems

  • Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for ARM64-based Systems

  • Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2022

  • Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2 for ARM64-based Systems

  • Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2 for x64-based Systems

  • Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 25H2 for ARM64-based Systems

  • Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 25H2 for x64-based Systems

  • Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 26H1 for x64-based Systems

  • Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 23H2 for ARM64-based Systems

  • Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 23H2 for x64-based Systems

  • Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 24H2 for ARM64-based Systems

  • Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 24H2 for x64-based Systems

  • Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2025

  • Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 26H1 for ARM64-based Systems

  • Microsoft .NET Framework 3.5 on Windows Server 2012

  • Microsoft .NET Framework 3.5 on Windows Server 2012 R2

Remediation

Install KB5093446. Install KB5093447. Install KB5093448. Install KB5087065. Install KB5087067. Install KB5087063. Install KB5087066. Install KB5087068. Install KB5087064. Install KB5087061. Install KB5087059. Install KB5087053. Install KB5087051. Install KB5087055. Install KB5087058. Install KB5087054. Install KB5087048. Install KB5087049.

Vendor-listed fixes

  • 10.0.8

  • 8.0.27

  • 9.0.16

  • 4.8.9334.0 and 4.8.4802.0

CVEs in this advisory 1

CVE-2026-35433

Updates

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Updated by Microsoft Security Response Center

    The vendor changed the advisory after it was first published.

  3. Added to SecurityAlert

    We collected the advisory from the official source.

  4. Confirmed at the source

    Our collector saw this advisory during a later source check.

Keep investigating
See every advisory from this vendor