CVE-2026-62886
.NET Elevation of Privilege Vulnerability
CVE-2026-62886 is fixed in 119 products on 3 platforms, first by Microsoft .NET Windows Desktop Runtime 8.0 8.0.30, released July 23, 2026. 3 other affected products have no fix yet. It is not reported as exploited. Patch Radar priority: High.
HighFixed on 3 platforms
CVSS
7.8
Important
Exploitation
None reported
Exploitation Less Likely
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0047
40th percentile
<p>Integer overflow or wraparound in .NET allows an unauthorized attacker to elevate privileges locally.</p>
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Microsoft | |||
| Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for 32-bit Systems | 14393.9512 | KB5123099 | Sep 8, 2026 |
| Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for x64-based Systems | 14393.9512 | KB5123099 | Sep 8, 2026 |
| Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 version 1607 | 14393.9612 | KB5126868 | Oct 13, 2026 |
| Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 | 14393.9612 | KB5126868 | Oct 13, 2026 |
| Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2019 | KB5127666 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for 32-bit Systems | KB5126043 | Sep 8, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for ARM64-based Systems | KB5126043 | Sep 8, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for x64-based Systems | KB5126043 | Sep 8, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 version 1809 | KB5127666 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for 32-bit Systems | KB5126421 | Sep 8, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for ARM64-based Systems | KB5126421 | Sep 8, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based Systems | KB5126421 | Sep 8, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2 for 32-bit Systems | KB5126046 | Sep 8, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2 for ARM64-based Systems | KB5126046 | Sep 8, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2 for x64-based Systems | KB5126046 | Sep 8, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for 32-bit Systems | KB5126046 | Sep 8, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for ARM64-based Systems | KB5126046 | Sep 8, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2 for x64-based Systems | KB5126046 | Sep 8, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 version 1809 | KB5127685 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 version 21H2 | KB5127683 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 version 22H2 | KB5127683 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 | KB5127685 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022 | KB5127687 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2 for 32-bit Systems | KB5126421 | Sep 8, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2 for ARM64-based Systems | KB5126421 | Sep 8, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2 for x64-based Systems | KB5126421 | Sep 8, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 22H2 for 32-bit Systems | KB5126421 | Sep 8, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 22H2 for ARM64-based Systems | KB5126421 | Sep 8, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 22H2 for x64-based Systems | KB5126421 | Sep 8, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 version 21H2 | KB5127689 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 version 22H2 | KB5127689 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 23H2 for ARM64-based Systems | KB5126424 | Sep 8, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 23H2 for x64-based Systems | KB5126424 | Sep 8, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 24H2 for ARM64-based Systems | KB5126052 | Sep 8, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 24H2 for x64-based Systems | KB5126052 | Sep 8, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 25H2 for ARM64-based Systems | KB5126052 | Sep 8, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 25H2 for x64-based Systems | KB5126052 | Sep 8, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 23H2 | KB5127692 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 24H2 | KB5127690 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 25H2 | KB5127690 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 version 26H2 | KB5127694 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2022 | KB5127693 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2025 | KB5127690 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 on Windows 11 Version 26H1 for ARM64-based Systems | KB5120747 | Aug 11, 2026 | |
| Microsoft .NET Framework 3.5 on Windows 11 version 26H1 | KB5127696 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 on Windows 11 version 26H1 for x64-based Systems | KB5120747 | Aug 11, 2026 | |
| Microsoft .NET Framework 3.5 on Windows Server 2012 | KB5127660 | Oct 13, 2026 | |
| Microsoft .NET Framework 3.5 on Windows Server 2012 R2 | KB5127664 | Oct 13, 2026 | |
| Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 | KB5126044 | Sep 8, 2026 | |
| Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 | KB5126045 | Sep 8, 2026 | |
| Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for 32-bit Systems | KB5126047 | Sep 8, 2026 | |
| Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems | KB5126047 | Sep 8, 2026 | |
| Microsoft .NET Framework 4.8 on Windows Server 2012 | KB5126049 | Sep 8, 2026 | |
| Microsoft .NET Framework 4.8 on Windows Server 2012 R2 | KB5126051 | Sep 8, 2026 | |
| Microsoft .NET Framework 4.8 on Windows Server 2016 | KB5126047 | Sep 8, 2026 | |
| Microsoft .NET Framework 4.8.1 on Windows 11 Version 26H1 for ARM64-based Systems | KB5126053 | Sep 8, 2026 | |
| Microsoft .NET Framework 4.8.1 on Windows 11 version 26H1 for x64-based Systems | KB5126053 | Sep 8, 2026 | |
| Windows apps | |||
| Microsoft .NET Windows Desktop Runtime 8.0 | 8.0.30 | Microsoft .NET Windows Desktop Runtime 8.0 8.0.30 | Jul 23, 2026 |
| Linux | |||
| aspnetcore-runtime-10.0 · amzn 2023 | 10.0.12-1.amzn2023.0.2 | ALAS2023-2026-3111 | Sep 28, 2026 |
| aspnetcore-runtime-8.0 · amzn 2023 | 8.0.31-1.amzn2023.0.2 | ALAS2023-2026-3114 | Sep 28, 2026 |
| aspnetcore-runtime-9.0 · amzn 2023 | 9.0.20-1.amzn2023.0.3 | ALAS2023-2026-3113 | Sep 28, 2026 |
| aspnetcore-runtime-dbg-10.0 · amzn 2023 | 10.0.12-1.amzn2023.0.2 | ALAS2023-2026-3111 | Sep 28, 2026 |
| aspnetcore-runtime-dbg-8.0 · amzn 2023 | 8.0.31-1.amzn2023.0.2 | ALAS2023-2026-3114 | Sep 28, 2026 |
| aspnetcore-runtime-dbg-9.0 · amzn 2023 | 9.0.20-1.amzn2023.0.3 | ALAS2023-2026-3113 | Sep 28, 2026 |
| aspnetcore-targeting-pack-10.0 · amzn 2023 | 10.0.12-1.amzn2023.0.2 | ALAS2023-2026-3111 | Sep 28, 2026 |
| aspnetcore-targeting-pack-8.0 · amzn 2023 | 8.0.31-1.amzn2023.0.2 | ALAS2023-2026-3114 | Sep 28, 2026 |
| aspnetcore-targeting-pack-9.0 · amzn 2023 | 9.0.20-1.amzn2023.0.3 | ALAS2023-2026-3113 | Sep 28, 2026 |
| dotnet · amzn 2023 | 8.0.131-1.amzn2023.0.2 | ALAS2023-2026-3114 | Sep 28, 2026 |
| dotnet-apphost-pack-10.0 · amzn 2023 | 10.0.12-1.amzn2023.0.2 | ALAS2023-2026-3111 | Sep 28, 2026 |
| dotnet-apphost-pack-10.0-debuginfo · amzn 2023 | 10.0.12-1.amzn2023.0.2 | ALAS2023-2026-3111 | Sep 28, 2026 |
| dotnet-apphost-pack-8.0 · amzn 2023 | 8.0.31-1.amzn2023.0.2 | ALAS2023-2026-3114 | Sep 28, 2026 |
| dotnet-apphost-pack-8.0-debuginfo · amzn 2023 | 8.0.31-1.amzn2023.0.2 | ALAS2023-2026-3114 | Sep 28, 2026 |
| dotnet-apphost-pack-9.0 · amzn 2023 | 9.0.20-1.amzn2023.0.3 | ALAS2023-2026-3113 | Sep 28, 2026 |
| dotnet-apphost-pack-9.0-debuginfo · amzn 2023 | 9.0.20-1.amzn2023.0.3 | ALAS2023-2026-3113 | Sep 28, 2026 |
| dotnet-host · amzn 2023 | 8.0.31-1.amzn2023.0.2 | ALAS2023-2026-3114 | Sep 28, 2026 |
| dotnet-host-debuginfo · amzn 2023 | 8.0.31-1.amzn2023.0.2 | ALAS2023-2026-3114 | Sep 28, 2026 |
| dotnet-hostfxr-10.0 · amzn 2023 | 10.0.12-1.amzn2023.0.2 | ALAS2023-2026-3111 | Sep 28, 2026 |
| dotnet-hostfxr-10.0-debuginfo · amzn 2023 | 10.0.12-1.amzn2023.0.2 | ALAS2023-2026-3111 | Sep 28, 2026 |
| dotnet-hostfxr-8.0 · amzn 2023 | 8.0.31-1.amzn2023.0.2 | ALAS2023-2026-3114 | Sep 28, 2026 |
| dotnet-hostfxr-8.0-debuginfo · amzn 2023 | 8.0.31-1.amzn2023.0.2 | ALAS2023-2026-3114 | Sep 28, 2026 |
| dotnet-hostfxr-9.0 · amzn 2023 | 9.0.20-1.amzn2023.0.3 | ALAS2023-2026-3113 | Sep 28, 2026 |
| dotnet-hostfxr-9.0-debuginfo · amzn 2023 | 9.0.20-1.amzn2023.0.3 | ALAS2023-2026-3113 | Sep 28, 2026 |
| dotnet-runtime-10.0 · amzn 2023 | 10.0.12-1.amzn2023.0.2 | ALAS2023-2026-3111 | Sep 28, 2026 |
| dotnet-runtime-10.0-debuginfo · amzn 2023 | 10.0.12-1.amzn2023.0.2 | ALAS2023-2026-3111 | Sep 28, 2026 |
| dotnet-runtime-8.0 · amzn 2023 | 8.0.31-1.amzn2023.0.2 | ALAS2023-2026-3114 | Sep 28, 2026 |
| dotnet-runtime-8.0-debuginfo · amzn 2023 | 8.0.31-1.amzn2023.0.2 | ALAS2023-2026-3114 | Sep 28, 2026 |
| dotnet-runtime-9.0 · amzn 2023 | 9.0.20-1.amzn2023.0.3 | ALAS2023-2026-3113 | Sep 28, 2026 |
| dotnet-runtime-9.0-debuginfo · amzn 2023 | 9.0.20-1.amzn2023.0.3 | ALAS2023-2026-3113 | Sep 28, 2026 |
| dotnet-runtime-dbg-10.0 · amzn 2023 | 10.0.12-1.amzn2023.0.2 | ALAS2023-2026-3111 | Sep 28, 2026 |
| dotnet-runtime-dbg-8.0 · amzn 2023 | 8.0.31-1.amzn2023.0.2 | ALAS2023-2026-3114 | Sep 28, 2026 |
| dotnet-runtime-dbg-9.0 · amzn 2023 | 9.0.20-1.amzn2023.0.3 | ALAS2023-2026-3113 | Sep 28, 2026 |
| dotnet-sdk-10.0 · amzn 2023 | 10.0.112-1.amzn2023.0.2 | ALAS2023-2026-3111 | Sep 28, 2026 |
| dotnet-sdk-10.0-debuginfo · amzn 2023 | 10.0.112-1.amzn2023.0.2 | ALAS2023-2026-3111 | Sep 28, 2026 |
| dotnet-sdk-10.0-source-built-artifacts · amzn 2023 | 10.0.112-1.amzn2023.0.2 | ALAS2023-2026-3111 | Sep 28, 2026 |
| dotnet-sdk-8.0 · amzn 2023 | 8.0.131-1.amzn2023.0.2 | ALAS2023-2026-3114 | Sep 28, 2026 |
| dotnet-sdk-8.0-debuginfo · amzn 2023 | 8.0.131-1.amzn2023.0.2 | ALAS2023-2026-3114 | Sep 28, 2026 |
| dotnet-sdk-8.0-source-built-artifacts · amzn 2023 | 8.0.131-1.amzn2023.0.2 | ALAS2023-2026-3114 | Sep 28, 2026 |
| dotnet-sdk-9.0 · amzn 2023 | 9.0.121-1.amzn2023.0.3 | ALAS2023-2026-3113 | Sep 28, 2026 |
| dotnet-sdk-9.0-debuginfo · amzn 2023 | 9.0.121-1.amzn2023.0.3 | ALAS2023-2026-3113 | Sep 28, 2026 |
| dotnet-sdk-9.0-source-built-artifacts · amzn 2023 | 9.0.121-1.amzn2023.0.3 | ALAS2023-2026-3113 | Sep 28, 2026 |
| dotnet-sdk-aot-10.0 · amzn 2023 | 10.0.112-1.amzn2023.0.2 | ALAS2023-2026-3111 | Sep 28, 2026 |
| dotnet-sdk-aot-10.0-debuginfo · amzn 2023 | 10.0.112-1.amzn2023.0.2 | ALAS2023-2026-3111 | Sep 28, 2026 |
| dotnet-sdk-aot-9.0 · amzn 2023 | 9.0.121-1.amzn2023.0.3 | ALAS2023-2026-3113 | Sep 28, 2026 |
| dotnet-sdk-aot-9.0-debuginfo · amzn 2023 | 9.0.121-1.amzn2023.0.3 | ALAS2023-2026-3113 | Sep 28, 2026 |
| dotnet-sdk-dbg-10.0 · amzn 2023 | 10.0.112-1.amzn2023.0.2 | ALAS2023-2026-3111 | Sep 28, 2026 |
| dotnet-sdk-dbg-8.0 · amzn 2023 | 8.0.131-1.amzn2023.0.2 | ALAS2023-2026-3114 | Sep 28, 2026 |
| dotnet-sdk-dbg-9.0 · amzn 2023 | 9.0.121-1.amzn2023.0.3 | ALAS2023-2026-3113 | Sep 28, 2026 |
| dotnet-targeting-pack-10.0 · amzn 2023 | 10.0.12-1.amzn2023.0.2 | ALAS2023-2026-3111 | Sep 28, 2026 |
| dotnet-targeting-pack-8.0 · amzn 2023 | 8.0.31-1.amzn2023.0.2 | ALAS2023-2026-3114 | Sep 28, 2026 |
| dotnet-targeting-pack-9.0 · amzn 2023 | 9.0.20-1.amzn2023.0.3 | ALAS2023-2026-3113 | Sep 28, 2026 |
| dotnet-templates-10.0 · amzn 2023 | 10.0.112-1.amzn2023.0.2 | ALAS2023-2026-3111 | Sep 28, 2026 |
| dotnet-templates-8.0 · amzn 2023 | 8.0.131-1.amzn2023.0.2 | ALAS2023-2026-3114 | Sep 28, 2026 |
| dotnet-templates-9.0 · amzn 2023 | 9.0.121-1.amzn2023.0.3 | ALAS2023-2026-3113 | Sep 28, 2026 |
| dotnet10.0-debuginfo · amzn 2023 | 10.0.112-1.amzn2023.0.2 | ALAS2023-2026-3111 | Sep 28, 2026 |
| dotnet10.0-debugsource · amzn 2023 | 10.0.112-1.amzn2023.0.2 | ALAS2023-2026-3111 | Sep 28, 2026 |
| dotnet8.0-debuginfo · amzn 2023 | 8.0.131-1.amzn2023.0.2 | ALAS2023-2026-3114 | Sep 28, 2026 |
| dotnet8.0-debugsource · amzn 2023 | 8.0.131-1.amzn2023.0.2 | ALAS2023-2026-3114 | Sep 28, 2026 |
| dotnet9.0-debugsource · amzn 2023 | 9.0.121-1.amzn2023.0.3 | ALAS2023-2026-3113 | Sep 28, 2026 |
| netstandard-targeting-pack-2.1 · amzn 2023 | 8.0.131-1.amzn2023.0.2 | ALAS2023-2026-3114 | Sep 28, 2026 |
| No fix yet | |||
| Microsoft Windows Desktop Runtime - 8.0.25 (arm64) (Windows apps) | No fix yet | no-fix | n/a |
| Microsoft Windows Desktop Runtime - 8.0.25 (x64) (Windows apps) | No fix yet | no-fix | n/a |
| Microsoft Windows Desktop Runtime - 8.0.25 (x86) (Windows apps) | No fix yet | no-fix | n/a |
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