CVE-2026-69439HighCVSS 8.8
.NET and Visual Studio Elevation of Privilege Vulnerability
🔗 CVE IDs covered (1)
📋 Description
Heap-based buffer overflow in .NET and Visual Studio allows an unauthorized attacker to elevate privileges over a network.
🎯 Affected products6
- .NET 10.0 installed on Windows
- .NET 11.0 installed on Windows
- .NET 8.0 installed on Windows
- .NET 9.0 installed on Windows
- Microsoft Visual Studio 2022 version 17.14
- Microsoft Visual Studio 2026 version 18.9
✅ Remediation
KB5126106 (Security Update) — fixed build 10.0.12 KB5126104 (Security Update) — fixed build 8.0.31 KB5126105 (Security Update) — fixed build 9.0.20 KBRelease Notes (Security Update) — fixed build 17.14.40 KBRelease Notes (Security Update) — fixed build 18.9.3 Security Update — fixed build 11.0 RC1
🔗 References (12)
- advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69439
- patchhttps://dotnet.microsoft.com/download/dotnet/10.0
- referencehttps://support.microsoft.com/help/5126106
- patchhttps://dotnet.microsoft.com/download/dotnet/8.0
- referencehttps://support.microsoft.com/help/5126104
- patchhttps://dotnet.microsoft.com/download/dotnet/9.0
- referencehttps://support.microsoft.com/help/5126105
- patchhttps://www.catalog.update.microsoft.com/Search.aspx?q=Visual Studio 2022 17.14.40
- referencehttps://learn.microsoft.com/en-us/visualstudio/releases/2022/release-notes
- patchhttps://www.catalog.update.microsoft.com/Search.aspx?q=Visual Studio 2026 18.9.3
- referencehttps://learn.microsoft.com/en-us/visualstudio/releases/2026/release-notes
- patchhttps://dotnet.microsoft.com/download/dotnet/11.0