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Recorded 15 Oct 2026 at 21:30 UTC. This is what ChangeIntel recorded, including the title, summary, facts and links. It is not a statement of the source's current position. See the latest record.

CVEMicrosoft Security Response Center

ASP.NET Core Remote Code Execution Vulnerability

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

Cite this recorded revision

What it said

CVE
CVE-2026-102870
Severity
Important
CVSS base score
8.8
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Impact
Remote Code Execution
Exploitation detected
Not reported by MSRC
Publicly disclosed
No
Exploitability
Exploitation Less Likely
Component
ASP.NET Core
Weakness
CWE-94: Improper Control of Generation of Code ('Code Injection')
Issued by
Microsoft
Customer action
Required: apply the update
Affected products
Microsoft Visual Studio 2022 version 17.14, Microsoft Visual Studio 2026 version 18.10, Microsoft.AspNetCore.Components.WebAssembly.Server on .NET 10.0 installed on Linux, Microsoft.AspNetCore.Components.WebAssembly.Server on .NET 10.0 installed on Mac OS, Microsoft.AspNetCore.Components.WebAssembly.Server on .NET 10.0 installed on Windows, Microsoft.AspNetCore.Components.WebAssembly.Server on .NET 11.0 installed on Linux, Microsoft.AspNetCore.Components.WebAssembly.Server on .NET 11.0 installed on Mac OS, Microsoft.AspNetCore.Components.WebAssembly.Server on .NET 11.0 installed on Windows
Updates that fix it
No KB listed
CISA KEV
Not listed in the collected catalog
EPSS
0.8%; scored 15 Oct 2026
Public exploit code
No Nuclei template listed
Published
13 Oct 2026 07:00 UTC
Last revised
13 Oct 2026 07:00 UTC
Revision note
Information published.

Source evidence when recorded

Microsoft security releases
Complete at observationRead 15 Oct 2026 at 21:30 UTC
CISA KEV
Complete at observationRead 15 Oct 2026 at 21:30 UTC
FIRST EPSS
Complete at observationRead 15 Oct 2026 at 21:30 UTC
Public exploit code
Complete at observationRead 15 Oct 2026 at 21:30 UTC

Coverage describes the sources at this observation. A complete read then does not establish their current position.

What changed

First observed 14 Oct 2026
  1. 15 Oct 2026 · 21:30:54 UTC EPSS0.8%; scored 14 Oct 2026 → 0.8%; scored 15 Oct 2026
  2. 15 Oct 2026 · 01:07:54 UTC EPSSNot scored → 0.8%; scored 14 Oct 2026

The most recent 100 field changes are listed. Complete recorded revisions are kept separately.

Cite this recorded revision to keep the same title, summary, facts and links when the page changes.

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ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 26 Oct 05:31 UTC · 271 of 271 readable · 269 fully read · documentation 464/464 current

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