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NVD / CVE Program· CNA microsoft

CVE-2026-102870: ASP.NET Core Remote Code Execution Vulnerability

HighCVSS 8.8 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 35/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.90% (FIRST EPSS); higher than 60.3% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: .NET 10.0 installed on Linux 10.0.403; .NET 10.0 installed on Mac OS 10.0.403; .NET 10.0 installed on Windows 10.0.403.

Low priority for now. Upgrade to .NET 10.0 installed on Linux 10.0.403; .NET 10.0 installed on Mac OS 10.0.403; .NET 10.0 installed on Windows 10.0.403 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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

Published
Oct 13, 2026
Updated
Nov 10, 2026
EPSS
0.9% · 60th percentile

Report tools

JSON

Action score

35

Monitor

Low priority for now.

CVSS
35 / 40 · 8.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.9%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · microsoft
8.8
NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-102870

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (microsoft). Independent of NVD's CPE analysis and usually ahead of it.

  • Microsoft .NET 10.0 installed on Linux

    • 10.0.0 and later · before 10.0.403affected

  • Microsoft .NET 10.0 installed on Mac OS

    • 10.0.0 and later · before 10.0.403affected

  • Microsoft .NET 10.0 installed on Windows

    • 10.0.0 and later · before 10.0.403affected

  • Microsoft .NET 11.0 installed on Linux

    • 11.0.0-preview.1 and later · before 11.0.100-rc.3affected

  • Microsoft .NET 11.0 installed on Mac OS

    • 11.0.0-preview.1 and later · before 11.0.100-rc.3affected

  • Microsoft .NET 11.0 installed on Windows

    • 11.0.0-preview.1 and later · before 11.0.100-rc.3affected

  • Microsoft Microsoft Visual Studio 2019 version 16.11

    • 16.11.0 and later · before 16.11.61affected

  • Microsoft Microsoft Visual Studio 2022 version 17.14

    • 17.14.0 and later · before 17.14.43affected

  • Microsoft Microsoft Visual Studio 2026 version 18.10

    • 18.10.0 and later · before 18.10.4affected

  • Microsoft Microsoft Visual Studio 2026 version 18.11

    • 18.11.0 and later · before 18.11.2affected

  • Microsoft Microsoft Visual Studio 2026 version 18.12

    • 18.12.0 and later · before 18.12 Insiders 3affected

  • Microsoft Microsoft.AspNetCore.Components.WebAssembly.DevServer

    • 11.0.0-preview.1 and later · before 10.0.14affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:10aspnetcore-runtime-10.0before 10.0.13-1.el10_210.0.13-1.el10_2
AlmaLinux:10aspnetcore-runtime-dbg-10.0before 10.0.13-1.el10_210.0.13-1.el10_2
AlmaLinux:10aspnetcore-targeting-pack-10.0before 10.0.13-1.el10_210.0.13-1.el10_2
AlmaLinux:10dotnet-apphost-pack-10.0before 10.0.13-1.el10_210.0.13-1.el10_2
AlmaLinux:10dotnet-hostbefore 10.0.13-1.el10_210.0.13-1.el10_2
AlmaLinux:10dotnet-hostfxr-10.0before 10.0.13-1.el10_210.0.13-1.el10_2
AlmaLinux:10dotnet-runtime-10.0before 10.0.13-1.el10_210.0.13-1.el10_2
AlmaLinux:10dotnet-runtime-dbg-10.0before 10.0.13-1.el10_210.0.13-1.el10_2
AlmaLinux:10dotnet-sdk-10.0before 10.0.113-1.el10_210.0.113-1.el10_2
AlmaLinux:10dotnet-sdk-10.0-source-built-artifactsbefore 10.0.113-1.el10_210.0.113-1.el10_2
AlmaLinux:10dotnet-sdk-aot-10.0before 10.0.113-1.el10_210.0.113-1.el10_2
AlmaLinux:10dotnet-sdk-dbg-10.0before 10.0.113-1.el10_210.0.113-1.el10_2
AlmaLinux:10dotnet-targeting-pack-10.0before 10.0.13-1.el10_210.0.13-1.el10_2
AlmaLinux:10dotnet-templates-10.0before 10.0.113-1.el10_210.0.113-1.el10_2
AlmaLinux:8aspnetcore-runtime-10.0before 10.0.13-1.el8_1010.0.13-1.el8_10
AlmaLinux:8aspnetcore-runtime-dbg-10.0before 10.0.13-1.el8_1010.0.13-1.el8_10
AlmaLinux:8aspnetcore-targeting-pack-10.0before 10.0.13-1.el8_1010.0.13-1.el8_10
AlmaLinux:8dotnetbefore 10.0.113-1.el8_1010.0.113-1.el8_10
AlmaLinux:8dotnet-apphost-pack-10.0before 10.0.13-1.el8_1010.0.13-1.el8_10
AlmaLinux:8dotnet-hostfxr-10.0before 10.0.13-1.el8_1010.0.13-1.el8_10
AlmaLinux:8dotnet-runtime-10.0before 10.0.13-1.el8_1010.0.13-1.el8_10
AlmaLinux:8dotnet-runtime-dbg-10.0before 10.0.13-1.el8_1010.0.13-1.el8_10
AlmaLinux:8dotnet-sdk-10.0before 10.0.113-1.el8_1010.0.113-1.el8_10
AlmaLinux:8dotnet-sdk-10.0-source-built-artifactsbefore 10.0.113-1.el8_1010.0.113-1.el8_10

+24

Same product

microsoft: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-96230ASP.NET Core Remote Code Execution Vulnerability
    35Monitor
  • CVE-2026-103572Visual Studio Tools for Applications and SQL Server Management Studio Remote Code Execution Vulnerability
    35Monitor
  • CVE-2026-109468ASP.NET Core Denial of Service Vulnerability
    30Monitor

Published before and after this one in the same product

  • Later →CVE-2026-70159Oct 13, 2026 · ASP.NET Core Denial of Service Vulnerability
    30Monitor
  • Later →CVE-2026-70162Oct 13, 2026 · .NET Denial of Service Vulnerability
    23Monitor
  • Later →CVE-2026-70179Oct 13, 2026 · ASP.NET Core Elevation of Privilege Vulnerability
    30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
.NET 10.0 installed on Linux10.0.403 · KB5133966Microsoft (MSRC)
.NET 10.0 installed on Mac OS10.0.403 · KB5133966Microsoft (MSRC)
.NET 10.0 installed on Windows10.0.403 · KB5133966Microsoft (MSRC)
.NET 11.0 installed on Linux11.0.100-rc.3 · Release NotesMicrosoft (MSRC)
.NET 11.0 installed on Mac OS11.0.100-rc.3 · Release NotesMicrosoft (MSRC)
.NET 11.0 installed on Windows11.0.100-rc.3 · Release NotesMicrosoft (MSRC)
Microsoft Visual Studio 2019 version 16.1116.11.61 · Release NotesMicrosoft (MSRC)
Microsoft Visual Studio 2022 version 17.1417.14.43 · Release NotesMicrosoft (MSRC)
Microsoft Visual Studio 2026 version 18.1018.10.4 · Release NotesMicrosoft (MSRC)
Microsoft Visual Studio 2026 version 18.1118.11.2 · Release NotesMicrosoft (MSRC)
Microsoft Visual Studio 2026 version 18.1218.12 Insiders 3 · Release NotesMicrosoft (MSRC)
Microsoft.AspNetCore.Components.WebAssembly.DevServer10.0.14 · KB5133966Microsoft (MSRC)
Microsoft.AspNetCore.Components.WebAssembly.Server10.0.14 · KB5133966Microsoft (MSRC)
Microsoft.AspNetCore.Components.WebAssembly.Server on .NET 10.0 runtime installed on Linux10.0.13 · Release NotesMicrosoft (MSRC)
Microsoft.AspNetCore.Components.WebAssembly.Server on .NET 10.0 runtime installed on Mac OS10.0.13 · Release NotesMicrosoft (MSRC)
Microsoft.AspNetCore.Components.WebAssembly.Server on .NET 10.0 runtime installed on Windows10.0.13 · Release NotesMicrosoft (MSRC)
Microsoft.AspNetCore.Components.WebAssembly.Server on .NET 11.0 runtime installed on Linux11.0.0-rc.2.26478.115 · Release NotesMicrosoft (MSRC)
Microsoft.AspNetCore.Components.WebAssembly.Server on .NET 11.0 runtime installed on Mac OS11.0.0-rc.2.26478.115 · Release NotesMicrosoft (MSRC)
Microsoft.AspNetCore.Components.WebAssembly.Server on .NET 11.0 runtime installed on Windows11.0.0-rc.2.26478.115 · Release NotesMicrosoft (MSRC)
almalinux:aspnetcore-runtime-10.010.0.13-1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:aspnetcore-runtime-dbg-10.010.0.13-1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:aspnetcore-targeting-pack-10.010.0.13-1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:dotnet10.0.113-1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:dotnet-apphost-pack-10.010.0.13-1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:dotnet-hostfxr-10.010.0.13-1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:dotnet-runtime-10.010.0.13-1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:dotnet-runtime-dbg-10.010.0.13-1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:dotnet-sdk-10.010.0.113-1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:dotnet-sdk-10.0-source-built-artifacts10.0.113-1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:dotnet-sdk-aot-10.010.0.113-1.el8_10 · AlmaLinux:8Package registry (OSV)

+5

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. Fix recordedsame day
  3. TodayNov 13, 2026+31 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-1035720 days apartVisual Studio Tools for Applications and SQL Server Management Studio Remote Code Execution Vulnerability
    35Monitor

Not on record for this CVE: patch commit or PR link · researcher credit · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-94 · Improper Control of Generation of Code ('Code Injection')

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓
  2. SSVC exploitation— → none
  3. Exploit maturity— → none

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records