Advisoriesby IbisMicrosoftCVE-2026-62886
Microsoft .NET Framework 3.5: integer overflow
Fix: upgrade to 2.0.50727.8987 AND 3.0.30729.8982 or later (9 fixed versions below)
Integer overflow or wraparound in .NET allows an unauthorized attacker to elevate privileges locally.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Microsoft .NET Framework 3.5 Product | >= 3.5.0, < 2.0.50727.8987 AND 3.0.30729.8982 | 2.0.50727.8987 AND 3.0.30729.8982 |
| Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 Product | >= 3.0.0.0, < 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0 | 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0 |
| Microsoft .NET Framework 3.5 AND 4.7.2 Product | >= 4.7.0, < 2.0.50727.9070 & 3.0.30729.9068 & 4.7.4145.0 | 2.0.50727.9070 & 3.0.30729.9068 & 4.7.4145.0 |
| Microsoft .NET Framework 3.5 AND 4.8 Product | >= 4.8.0, < 2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0 | 2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0 |
| Microsoft .NET Framework 3.5 AND 4.8.1 Product | >= 4.8.1, < 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0 | 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0 |
| Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 Product | >= 4.7.0, < 4.7.4145.0 | 4.7.4145.0 |
| Microsoft .NET Framework 4.8 Product | >= 4.8.0, < 4.8.4806.0 | 4.8.4806.0 |
| Microsoft .NET Framework 4.8.1 Product | >= 4.8.0.0, < 4.8.9347.0 | 4.8.9347.0 |
| Microsoft Visual Studio 2026 version 18.8 Product | >= 18.0, < 18.8.3 | 18.8.3 |
Changes since it was listed
Fixed in: .NET 10.0 10.0.11, .NET 8.0 8.0.30, .NET 9.0 9.0.19 to Microsoft .NET Framework 3.5 2.0.50727.8987 AND 3.0.30729.8982, Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7