Detections
Analytics
Security Update for Microsoft .NET Core SDK (November 2026)
high Nessus Plugin ID 380358
Synopsis
The Microsoft .NET Core SDK installations on the remote host are affected by multiple vulnerabilities.Description
The Microsoft .NET Core SDK installations on the remote host are missing security updates. It is, therefore, affected by multiple vulnerabilities:- Improper authentication in ASP.NET Core allows an unauthorized attacker to elevate privileges over a network. (CVE-2026-70175)
- Improper access control in .NET allows an authorized attacker to elevate privileges locally.
(CVE-2026-105544)
- Deserialization of untrusted data in Visual Studio allows an unauthorized attacker to execute code over a network. (CVE-2026-114151)
- Stack-based buffer overflow in Visual Studio allows an unauthorized attacker to execute code over a network. (CVE-2026-114152)
- Time-of-check time-of-use (toctou) race condition in .NET allows an authorized attacker to elevate privileges locally. (CVE-2026-114155)
- Heap-based buffer overflow in Visual Studio allows an unauthorized attacker to execute code over a network.
(CVE-2026-114158, CVE-2026-114159, CVE-2026-118745)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Update .NET Core SDK, remove vulnerable packages and refer to vendor advisory.See Also
https://dotnet.microsoft.com/en-us/download/dotnet/10.0
https://dotnet.microsoft.com/en-us/download/dotnet/8.0
https://dotnet.microsoft.com/en-us/download/dotnet/9.0
https://github.com/dotnet/announcements/issues/502
https://github.com/dotnet/announcements/issues/517
https://support.microsoft.com/kb/5135241
https://support.microsoft.com/kb/5135242
https://support.microsoft.com/kb/5135243
http://www.nessus.org/u?19189c97
http://www.nessus.org/u?19a2a623
http://www.nessus.org/u?1dadfc3d
http://www.nessus.org/u?2035a894
http://www.nessus.org/u?3453fd1a
http://www.nessus.org/u?4d02b76e
http://www.nessus.org/u?972b34f0
Plugin Details
Severity: High
ID: 380358
File Name: smb_nt_ms26_nov_dotnet_core_sdk.nasl
Version: 1.1
Type: Local
Agent: windows
Family: Windows
Published: 11/13/2026
Updated: 11/13/2026
Configuration: Enable paranoid mode
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5
Percentile: 92.8
CVSS v2
Risk Factor: High
Base Score: 9.3
Vector: CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2026-114158
CVSS v3
Risk Factor: High
Base Score: 8.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Vulnerability Information
CPE: cpe:/a:microsoft:.net_core
Required KB Items: installed_sw/.NET Core SDK Windows, Settings/ParanoidReport
Patch Publication Date: 11/10/2026
Vulnerability Publication Date: 11/10/2026
Reference Information
CVE: CVE-2026-105544, CVE-2026-114151, CVE-2026-114152, CVE-2026-114155, CVE-2026-114158, CVE-2026-114159, CVE-2026-118745, CVE-2026-70175