CVE-2026-69522
.NET and Visual Studio Remote Code Execution Vulnerability
CVE-2026-69522 is fixed in 50 products on 2 platforms, first by Microsoft ASP.NET Core Hosting Bundle 9.0 9.0.20, released August 14, 2026. 3 other affected products have no fix yet. It is not reported as exploited. Patch Radar priority: High.
HighFixed on 2 platforms
CVSS
8.8
Important
Exploitation
None reported
Exploitation Unlikely
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0084
58th percentile
<p>Heap-based buffer overflow in Visual Studio allows an unauthorized attacker to execute code over a network.</p>
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Microsoft | |||
| .NET 10.0 runtime installed on Windows | KB5126106 | Sep 8, 2026 | |
| .NET 8.0 runtime installed on Windows | KB5126104 | Sep 8, 2026 | |
| .NET 9.0 runtime installed on Windows | KB5126105 | 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 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 Server 2016 | 14393.9512 | KB5123099 | Sep 8, 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 Server 2019 | KB5126043 | Sep 8, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for 32-bit Systems | KB5126048 | Sep 8, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for ARM64-based Systems | KB5126048 | Sep 8, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based Systems | KB5126048 | 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 Server 2019 | KB5126048 | Sep 8, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2022 | KB5126050 | Sep 8, 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 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 Server 2022 | KB5126422 | Sep 8, 2026 | |
| Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2025 | KB5126052 | Sep 8, 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 10.0 | 10.0.12 | Microsoft .NET Windows Desktop Runtime 10.0 10.0.12 | Aug 22, 2026 |
| Microsoft .NET Windows Desktop Runtime 8.0 | 8.0.31 | Microsoft .NET Windows Desktop Runtime 8.0 8.0.31 | Aug 22, 2026 |
| Microsoft .NET Windows Desktop Runtime 9.0 | 9.0.20 | Microsoft .NET Windows Desktop Runtime 9.0 9.0.20 | Aug 21, 2026 |
| Microsoft ASP.NET Core Hosting Bundle 10.0 | 10.0.12 | Microsoft ASP.NET Core Hosting Bundle 10.0 10.0.12 | Aug 22, 2026 |
| Microsoft ASP.NET Core Hosting Bundle 8.0 | 8.0.31 | Microsoft ASP.NET Core Hosting Bundle 8.0 8.0.31 | Aug 22, 2026 |
| Microsoft ASP.NET Core Hosting Bundle 9.0 | 9.0.20 | Microsoft ASP.NET Core Hosting Bundle 9.0 9.0.20 | Aug 14, 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 |
Patch Radar data is free to use with attribution. Terms and how to credit it.
Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.