Advisoriesby IbisMicrosoftCVE-2026-69439
Microsoft .NET 10.0 runtime: heap buffer overflow
Fix: upgrade to 10.0.12 or later (6 fixed versions below)
Heap-based buffer overflow in .NET and Visual Studio allows an unauthorized attacker to elevate privileges over a network.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| .NET 10.0 runtime Product | >= 10.0.0, < 10.0.12 | 10.0.12 |
| .NET 11.0 runtime Product | >= 11.0.0, < 11.0 RC1 | 11.0 RC1 |
| .NET 8.0 runtime Product | >= 8.0.0, < 8.0.31 | 8.0.31 |
| .NET 9.0 runtime Product | >= 9.0.0, < 9.0.20 | 9.0.20 |
| Microsoft Visual Studio 2022 version 17.14 Product | >= 17.14.0, < 17.14.40 | 17.14.40 |
| Microsoft Visual Studio 2026 version 18.9 Product | >= 18.9.0, < 18.9.3 | 18.9.3 |
Changes since it was listed
Fixed in: .NET 10.0 10.0.12, .NET 11.0 11.0 RC1, .NET 8.0 8.0.31 to .NET 10.0 runtime 10.0.12, .NET 11.0 runtime 11.0 RC1, .NET 8.0 runtime 8.0.31
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-122