Security Update for Microsoft ASP.NET Core (September 2026)

medium Nessus Plugin ID 344807

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Synopsis

The Microsoft ASP.NET installations on the remote host are affected by a denial of service vulnerability.

Description

The Microsoft ASP.NET installations on the remote host are missing a security update. It is, therefore, affected by a denial of service vulnerability as referenced in the vendor advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update ASP.NET Core, remove vulnerable packages and refer to vendor advisory.

Plugin Details

Severity: Medium

ID: 344807

File Name: smb_nt_ms26_sep_aspdotnet_core.nasl

Version: 1.2

Type: Local

Agent: windows

Family: Windows

Published: 9/11/2026

Updated: 9/14/2026

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.61

CVSS v2

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4

Vector: CVSS2#AV:N/AC:H/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-69304

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:microsoft:asp.net_core

Required KB Items: SMB/Registry/Enumerated, installed_sw/ASP .NET Core Windows

Exploit Ease: No known exploits are available

Patch Publication Date: 9/8/2026

Vulnerability Publication Date: 9/8/2026

Reference Information

CVE: CVE-2026-69304

CWE: 409

IAVA: 2026-A-0962

Detections

Analytics