Featured disclosure · Microsoft
.NET SDK elevation of privilege
to SYSTEM on Windows.
The dotnet workload command in the .NET SDK exposes a named pipe with a weak ACL.
Any local user can drive that pipe to create or truncate arbitrary files in the context of another
local user — including a privileged one — turning a low-privilege foothold into full SYSTEM control.
Fixed in the June 2026 servicing release across every supported .NET SDK line.
- Vendor
- Microsoft
- Affected
- .NET SDK 8.0, 9.0, 10.0 — Windows only
- Weakness
- CWE-285 improper authorization
- Vector
- AV:L / AC:L / PR:L / UI:N / C:H / I:H / A:H
- Disclosed
- 9 June 2026 · Patch Tuesday
- Reported by
- kai63001