PatchTheCVECVE-2026-70197: Out-of-bounds write in .NET allows an unauthorized attacker to execute code over a network.
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HIGH 8.1REMOTEWATCHLIST
CVE-2026-70197 is a high-severity flaw (CVSS 8.1) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Out-of-bounds write in .NET allows an unauthorized attacker to execute code over a network.
Why this priority
- High severity
- Remotely exploitable, no login, no user action
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.1 (High) |
| Attack vector | Network (remote) |
| Attack complexity | High |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.7% (top 48%) |
| CISA exploited list | No |
| Weakness | CWE-787 |
| Published | 2026-10-13 |
| Last modified | 2026-10-22 |
Publisher (CNA): Microsoft Corporation
Timeline
- Published CVE record published
- Updated Record last modified
Exact fixes by distribution
NuGet (.NET) · Microsoft.NETCore.App.Runtime.win-arm64 · FIXED · 8.0.32 · vulnerable: >= 8.0.0, <= 8.0.31 · source
dotnet add package Microsoft.NETCore.App.Runtime.win-arm64 --version 8.0.32
NuGet (.NET) · Microsoft.NETCore.App.Runtime.win-x64 · FIXED · 8.0.32 · vulnerable: >= 8.0.0, <= 8.0.31 · source
dotnet add package Microsoft.NETCore.App.Runtime.win-x64 --version 8.0.32
NuGet (.NET) · Microsoft.NETCore.App.Runtime.win-x86 · FIXED · 8.0.32 · vulnerable: >= 8.0.0, <= 8.0.31 · source
dotnet add package Microsoft.NETCore.App.Runtime.win-x86 --version 8.0.32
Ubuntu 22.04 · dotnet6 · NOT AFFECTED
Ubuntu 22.04 · dotnet8 · NOT AFFECTED
Ubuntu 24.04 · dotnet8 · NOT AFFECTED
Ubuntu 24.04 · dotnet10 · NOT AFFECTED
Alpine 3.22 · dotnet8-runtime · FIXED · dotnet8-runtime-8.0.32-r0
apk add --upgrade dotnet8-runtime
apk info -v dotnet8-runtime
Alpine 3.22 · dotnet9-runtime · FIXED · dotnet9-runtime-9.0.21-r0
apk add --upgrade dotnet9-runtime
apk info -v dotnet9-runtime
Alpine 3.23 · dotnet10-runtime · FIXED · dotnet10-runtime-10.0.13-r0
apk add --upgrade dotnet10-runtime
apk info -v dotnet10-runtime
Alpine 3.23 · dotnet8-runtime · FIXED · dotnet8-runtime-8.0.32-r0
apk add --upgrade dotnet8-runtime
apk info -v dotnet8-runtime
Advisories and coverage
Official advisories
- Microsoft MSRC Update Guide: CVE-2026-70197 .NET Remote Code Execution Vulnerability 2026-10-19
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.