high8.8
CVE-2026-87697
Deserialization of untrusted data in .NET allows an unauthorized attacker to execute code over a network.
Impact
Deserialization of untrusted data in .NET allows an unauthorized attacker to execute code over a network.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| nuget | Microsoft.WindowsDesktop.App.Runtime.win-arm64 | >= 9.0.0, <= 9.0.20 | 9.0.21 |
| nuget | Microsoft.WindowsDesktop.App.Runtime.win-x64 | >= 9.0.0, <= 9.0.20 | 9.0.21 |
| nuget | Microsoft.WindowsDesktop.App.Runtime.win-x86 | >= 9.0.0, <= 9.0.20 | 9.0.21 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Microsoft | .NET 10.0 Runtime | from 10.0.0 before 10.0.13 |
| Microsoft | Microsoft Visual Studio 2022 Version 17.14 | from 17.14.0 before 17.14.42 |
| Microsoft | .NET 9.0 Runtime | from 9.0.0 before 9.0.21 |
| Microsoft | Microsoft Visual Studio 2026 Version 18.10 | from 18.10.0 before 18.10.4 |
| Microsoft | .NET 8.0 Runtime | from 8.0.0 before 8.0.32 |
| Microsoft | .NET 11.0 Runtime | from 11.0.0 before 11.0.0-rc.2 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-c27m-942f-rcfh
- https://github.com/dotnet/wpf/security/advisories/GHSA-c27m-942f-rcfh
- https://github.com/dotnet/announcements/issues/471
- https://github.com/dotnet/wpf/issues/12021
- https://nvd.nist.gov/vuln/detail/CVE-2026-87697
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-87697