Detections
Analytics
Security Update for Microsoft .NET Core SDK (June 2026)
high Nessus Plugin ID 320853
Synopsis
The remote Windows host is affected by a .NET Core SDK vulnerabilityDescription
The version of tested product installed on the remote host is prior to tested version. It is, therefore, affected by the following vulnerabilities as referenced in the vendor advisory.- Improper authorization in .NET allows an authorized attacker to elevate privileges locally.
(CVE-2026-45490)
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, remove vulnerable packages and refer to vendor advisory.See Also
https://github.com/dotnet/announcements/issues/403
https://dotnet.microsoft.com/download/dotnet/8.0
http://www.nessus.org/u?81e45d22
http://www.nessus.org/u?b0e66d7e
https://dotnet.microsoft.com/download/dotnet/9.0
http://www.nessus.org/u?d9285340
http://www.nessus.org/u?498ce219
https://dotnet.microsoft.com/download/dotnet/10.0
http://www.nessus.org/u?9e8206b1
http://www.nessus.org/u?d32f9ceb
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45490
https://support.microsoft.com/help/5097149
Plugin Details
Severity: High
ID: 320853
File Name: smb_nt_ms26_jun_dotnet_core_sdk.nasl
Version: 1.1
Type: Local
Agent: windows
Family: Windows
Published: 6/12/2026
Updated: 6/12/2026
Configuration: Enable paranoid mode
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: High
Score: 7.4
CVSS v2
Risk Factor: High
Base Score: 8.5
Vector: CVSS2#AV:N/AC:M/Au:S/C:C/I:C/A:C
CVSS Score Source: CVE-2026-45490
CVSS v3
Risk Factor: High
Base Score: 7.8
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/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: 6/9/2026
Vulnerability Publication Date: 6/9/2026
Reference Information
CVE: CVE-2026-45490
IAVA: 2026-A-0565