Detections
Analytics
Microsoft ASP.NET Core DoS (March 2026)
high Nessus Plugin ID 301994
Synopsis
The remote Windows host is affected by a denial of service vulnerability.Description
The version of ASP.NET Core installed on the remote Windows host is 8.0.x prior to 8.0.25, 9.0.x prior to 9.0.14, or 10.0.x prior to 10.0.4. It is, therefore, affected by a denial of service vulnerability. A specially crafted message to a SignalR server can cause uncontrolled resource consumption, exhausting an internal buffer and leading to denial of service.Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Update ASP.NET Core to version 8.0.25, 9.0.14, 10.0.4 or later.See Also
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26130
https://github.com/dotnet/aspnetcore/issues/65727
http://www.nessus.org/u?5492958f
http://www.nessus.org/u?83dd3f59
http://www.nessus.org/u?2e94e4fc
https://support.microsoft.com/en-us/help/5081278
Plugin Details
Severity: High
ID: 301994
File Name: smb_nt_ms26_mar_aspdotnet_core.nasl
Version: 1.1
Type: local
Agent: windows
Family: Windows : Microsoft Bulletins
Published: 3/12/2026
Updated: 3/12/2026
Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Low
Score: 3.6
CVSS v2
Risk Factor: High
Base Score: 7.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS Score Source: CVE-2026-26130
CVSS v3
Risk Factor: High
Base Score: 7.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Vulnerability Information
CPE: cpe:/a:microsoft:asp.net_core
Required KB Items: SMB/Registry/Enumerated, installed_sw/ASP .NET Core Windows
Patch Publication Date: 3/10/2026
Vulnerability Publication Date: 3/10/2026
Reference Information
CVE: CVE-2026-26130