8.8
High
CVE-2026-69439 Heap-based buffer overflow in .NET and Visual Studio allows an unauthorized attacker to elevate privileges over a…
Description
Heap-based buffer overflow in .NET and Visual Studio allows an unauthorized attacker to elevate privileges over a network.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| .NET 10.0 10.0 | 10.0.0 → < 10.0.12 | 10.0.12 |
| .NET 11.0 11.0 | 11.0.0 → latest | No fix stated |
| .NET 8.0 8.0 | 8.0.0 → < 8.0.31 | 8.0.31 |
| .NET 9.0 9.0 | 9.0.0 → < 9.0.20 | 9.0.20 |
| Microsoft Visual Studio 2022 version 17.14 17.14 | 17.14.0 → < 17.14.40 | 17.14.40 |
| Microsoft Visual Studio 2026 version 18.9 18.9 | 18.9.0 → < 18.9.3 | 18.9.3 |
| .NET 10.0 runtime 10.0 | 10.0.0 → < 10.0.12 | 10.0.12 |
| .NET 11.0 runtime 11.0 | 11.0.0 → latest | No fix stated |
| .NET 8.0 runtime 8.0 | 8.0.0 → < 8.0.31 | 8.0.31 |
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| Product | Affected versions | Fixed in |
|---|---|---|
| .NET 9.0 runtime 9.0 | 9.0.0 → < 9.0.20 | 9.0.20 |
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