CVE-2026-66822HighCVSS 5.9
.NET Information Disclosure Vulnerability
🔗 CVE IDs covered (1)
📋 Description
Insertion of sensitive information into sent data in .NET allows an unauthorized attacker to disclose information over a network.
🎯 Affected products14
- .NET 10.0 installed on Linux
- .NET 10.0 installed on Mac OS
- .NET 10.0 installed on Windows
- .NET 11.0 installed on Linux
- .NET 11.0 installed on Mac OS
- .NET 11.0 installed on Windows
- .NET 8.0 installed on Linux
- .NET 8.0 installed on Mac OS
- .NET 8.0 installed on Windows
- .NET 9.0 installed on Linux
- .NET 9.0 installed on Mac OS
- .NET 9.0 installed on Windows
- Microsoft Visual Studio 2022 version 17.14
- Microsoft Visual Studio 2026 version 18.10
✅ Remediation
KBRelease Notes (Security Update) — fixed build 11.0.0-rc.2 KB5130036 (Security Update) — fixed build 10.0.13 KB5130034 (Security Update) — fixed build 8.0.32 KB5130035 (Security Update) — fixed build 9.0.21 KBRelease Notes (Security Update) — fixed build 17.14.42 KBRelease Notes (Security Update) — fixed build 18.10.4
🔗 References (12)
- advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66822
- patchhttps://dotnet.microsoft.com/download/dotnet/11.0
- patchhttps://dotnet.microsoft.com/download/dotnet/10.0
- referencehttps://support.microsoft.com/help/5130036
- patchhttps://dotnet.microsoft.com/download/dotnet/8.0
- referencehttps://support.microsoft.com/help/5130034
- patchhttps://dotnet.microsoft.com/download/dotnet/9.0
- referencehttps://support.microsoft.com/help/5130035
- patchhttps://learn.microsoft.com/en-us/visualstudio/releases/2022/release-history
- referencehttps://learn.microsoft.com/en-us/visualstudio/releases/2022/release-notes
- patchhttps://learn.microsoft.com/en-us/visualstudio/releases/2026/release-history
- referencehttps://learn.microsoft.com/en-us/visualstudio/releases/2026/release-notes