Vulnerability · Published Aug 11, 2026 · Assigned by microsoft
CVE-2026-62886.NET Elevation of Privilege Vulnerability
High 7.8
In plain English
A high-severity integer overflow in Microsoft .NET Framework 3.5 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.5%top 59.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Integer overflow or wraparound in .NET allows an unauthorized attacker to elevate privileges locally.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.23 | dotnet10-runtime | 10.0.13-r0 | ALPINE-CVE-2026-62886 |
| Alpine:v3.24 | dotnet10-runtime | 10.0.12-r0 | ALPINE-CVE-2026-62886 |
| Alpine:v3.22 | dotnet8-runtime | 8.0.31-r0 | ALPINE-CVE-2026-62886 |
| Alpine:v3.23 | dotnet8-runtime | 8.0.31-r0 | ALPINE-CVE-2026-62886 |
| Alpine:v3.24 | dotnet8-runtime | 8.0.31-r0 | ALPINE-CVE-2026-62886 |
| Alpine:v3.22 | dotnet9-runtime | 9.0.20-r0 | ALPINE-CVE-2026-62886 |
| Alpine:v3.23 | dotnet9-runtime | 9.0.20-r0 | ALPINE-CVE-2026-62886 |
| Alpine:v3.24 | dotnet9-runtime | 9.0.20-r0 | ALPINE-CVE-2026-62886 |
| NuGet | microsoft.windowsdesktop.app.runtime.win-arm64 | 8.0.30 | GHSA-jqhp-238x-qhgf |
| NuGet | microsoft.windowsdesktop.app.runtime.win-arm64 | 9.0.19 | GHSA-jqhp-238x-qhgf |
| NuGet | microsoft.windowsdesktop.app.runtime.win-arm64 | 10.0.11 | GHSA-jqhp-238x-qhgf |
| NuGet | microsoft.windowsdesktop.app.runtime.win-x64 | 10.0.11 | GHSA-jqhp-238x-qhgf |
| NuGet | microsoft.windowsdesktop.app.runtime.win-x64 | 8.0.30 | GHSA-jqhp-238x-qhgf |
| NuGet | microsoft.windowsdesktop.app.runtime.win-x64 | 9.0.19 | GHSA-jqhp-238x-qhgf |
| NuGet | microsoft.windowsdesktop.app.runtime.win-x86 | 8.0.30 | GHSA-jqhp-238x-qhgf |
| NuGet | microsoft.windowsdesktop.app.runtime.win-x86 | 10.0.11 | GHSA-jqhp-238x-qhgf |
| NuGet | microsoft.windowsdesktop.app.runtime.win-x86 | 9.0.19 | GHSA-jqhp-238x-qhgf |
| Ubuntu:22.04:LTS | dotnet7 | no fix listed | UBUNTU-CVE-2026-62886 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft .NET Framework 3.5 | 3.5.0 – before 2.0.50727.8987 AND 3.0.30729.8982 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 | 3.0.0.0 – before 2.0.50727.9073 AND 3.0.30729.9070 AND 4.7.4150.0 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.7.2 | 4.7.0 – before 2.0.50727.9070 & 3.0.30729.9068 & 4.7.4145.0 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8 | 4.8.0 – before 2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8.1 | 4.8.1 – before 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0 |
| Microsoft | Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 | 4.7.0 – before 4.7.4145.0 |
| Microsoft | Microsoft .NET Framework 4.8 | 4.8.0 – before 4.8.4806.0 |
| Microsoft | Microsoft .NET Framework 4.8.1 | 4.8.0.0 – before 4.8.9347.0 |
| Microsoft | Microsoft Visual Studio 2026 version 18.8 | 18.0 – before 18.8.3 |
Weakness: CWE-190, CWE-122 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
References
- .NET Elevation of Privilege Vulnerability vendor-advisory, patch