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.NET

CVE-2026-35433 — .NET Elevation of Privilege Vulnerability

Important CVSS 7.3 EPSS 0.00528 2026-05 archive

Executive Summary

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

Overview

7.3
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Exploitation Unlikely
MS Exploit Likelihood
Category Elevation of Privilege
Released May 12 2026
Last Updated May 12 2026
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.00528 — 0.40388 percentile
NVD CVSS 7.3 HIGH — matches MSRC

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L/E:U/RL:O/RC:C
ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
Required
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
Low
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 6.4

EPSS Score

0.00528
probability of exploitation in the next 30 days
0.40388 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

30 affected products
Product KB Article Severity Impact Restart Required
.NET 10.0 installed on Windows 5093446 (Security Update) Important Elevation of Privilege Maybe
.NET 8.0 installed on Windows 5093447 (Security Update) Important Elevation of Privilege Maybe
.NET 9.0 installed on Windows 5093448 (Security Update) Important Elevation of Privilege Maybe
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for ARM64-based Systems 5087061 (Security Update) Important Elevation of Privilege Maybe
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for x64-based Systems 5087061 (Security Update) Important Elevation of Privilege Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for ARM64-based Systems 5087066 (Security Update) Important Elevation of Privilege Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based Systems 5087066 (Security Update) Important Elevation of Privilege Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2 for ARM64-based Systems 5087064 (Security Update) Important Elevation of Privilege Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2 for x64-based Systems 5087064 (Security Update) Important Elevation of Privilege Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for ARM64-based Systems 5087064 (Security Update) Important Elevation of Privilege Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for x64-based Systems 5087064 (Security Update) Important Elevation of Privilege Maybe
Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022 5087068 (Security Update) Important Elevation of Privilege Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2 for ARM64-based Systems 5087053 (Security Update) Important Elevation of Privilege Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2 for x64-based Systems 5087053 (Security Update) Important Elevation of Privilege Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 23H2 for ARM64-based Systems 5087058 (Security Update) Important Elevation of Privilege Yes
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 23H2 for x64-based Systems 5087058 (Security Update) Important Elevation of Privilege Yes
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 24H2 for ARM64-based Systems 5087054 (Security Update) Important Elevation of Privilege Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 24H2 for x64-based Systems 5087054 (Security Update) Important Elevation of Privilege Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 25H2 for ARM64-based Systems 5087051 (Security Update) Important Elevation of Privilege Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 25H2 for x64-based Systems 5087051 (Security Update) Important Elevation of Privilege Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 26H1 for ARM64-based Systems 5087055 (Security Update) Important Elevation of Privilege Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 26H1 for x64-based Systems 5087055 (Security Update) Important Elevation of Privilege Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2022 5087059 (Security Update) Important Elevation of Privilege Maybe
Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2025 5087051 (Security Update) Important Elevation of Privilege Maybe
Microsoft .NET Framework 3.5 on Windows Server 2012 5087048 (Security Update) Important Elevation of Privilege Maybe
Microsoft .NET Framework 3.5 on Windows Server 2012 R2 5087049 (Security Update) Important Elevation of Privilege Maybe
Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems 5087065 (Security Update) Important Elevation of Privilege Maybe
Microsoft .NET Framework 4.8 on Windows Server 2012 5087067 (Security Update) Important Elevation of Privilege Maybe
Microsoft .NET Framework 4.8 on Windows Server 2012 R2 5087063 (Security Update) Important Elevation of Privilege Maybe
Microsoft .NET Framework 4.8 on Windows Server 2016 5087065 (Security Update) Important Elevation of Privilege Maybe

Patches

18 patches
Article Type Restart
5093446 Security Update Maybe
5093447 Security Update Maybe
5093448 Security Update Maybe
5087061 Security Update Maybe
5087066 Security Update Maybe
5087064 Security Update Maybe
5087068 Security Update Maybe
5087053 Security Update Maybe
5087058 Security Update Yes
5087054 Security Update Maybe
5087051 Security Update Maybe
5087055 Security Update Maybe
5087059 Security Update Maybe
5087048 Security Update Maybe
5087049 Security Update Maybe
5087065 Security Update Maybe
5087067 Security Update Maybe
5087063 Security Update Maybe

Known Exploits

Acknowledgments

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