CVE-2026-102870HighMicrosoft CVSS 8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Microsoft security update for CVE-2026-102870

Published
October 13, 2026
Last Modified
—

🔗 CVE IDs covered (1)

CVE-2026-102870 →

📋 Microsoft's advisory

EchelonGraph does not copy Microsoft's advisory page: its FAQ and remediation text are not shown here. Read the advisory on https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-102870. This page also shows what EchelonGraph holds for CVE-2026-102870, with the description from its CVE record, which the CVE Numbering Authority that assigned the CVE wrote: for a CVE Microsoft assigned, often in the words of Microsoft's own advisory.

🎯 Affected products19

  • .NET 10.0 installed on Linux
  • .NET 10.0 installed on Mac OS
  • .NET 10.0 installed on Windows
  • .NET 11.0 installed on Linux
  • .NET 11.0 installed on Mac OS
  • .NET 11.0 installed on Windows
  • Microsoft Visual Studio 2019 version 16.11
  • Microsoft Visual Studio 2022 version 17.14
  • Microsoft Visual Studio 2026 version 18.10
  • Microsoft Visual Studio 2026 version 18.11
  • Microsoft Visual Studio 2026 version 18.12
  • Microsoft.AspNetCore.Components.WebAssembly.DevServer
  • Microsoft.AspNetCore.Components.WebAssembly.Server
  • Microsoft.AspNetCore.Components.WebAssembly.Server on .NET 10.0 runtime installed on Linux
  • Microsoft.AspNetCore.Components.WebAssembly.Server on .NET 10.0 runtime installed on Mac OS
  • Microsoft.AspNetCore.Components.WebAssembly.Server on .NET 10.0 runtime installed on Windows
  • Microsoft.AspNetCore.Components.WebAssembly.Server on .NET 11.0 runtime installed on Linux
  • Microsoft.AspNetCore.Components.WebAssembly.Server on .NET 11.0 runtime installed on Mac OS
  • Microsoft.AspNetCore.Components.WebAssembly.Server on .NET 11.0 runtime installed on Windows

✅ Updates Microsoft lists: 11 updates

11 rows: one per KB article or update, update type and fixed build. Their details are on Microsoft's advisory.

KB articleUpdateFixed build
—Security Update18.10.4
—Security Update17.14.43
—Security Update10.0.13
—Security Update11.0.0-rc.2.26478.115
—Security Update10.0.14
—Security Update10.0.14
—Security Update10.0.403
—Security Update11.0.100-rc.3
—Security Update16.11.61
—Security Update18.11.2
—Security Update18.12 Insiders 3

🧭 EchelonGraph on CVE-2026-102870

EchelonGraph score
8.8 HIGH
CISA KEV
Not listed
Fix status
A fix is available — apply it.

Description from the CVE record (CVE.org), as published by its numbering authority

Improper control of generation of code ('code injection') in ASP.NET Core allows an unauthorized attacker to execute code over a network.

Published by Microsoft Corporation, the CVE Numbering Authority that assigned CVE-2026-102870, in its CVE record at CVE.org; reused under the CVE Program's Terms of Use (its licence and MITRE's copyright notice are in our Terms of Service).

🔗 References (16)