Security Update for Microsoft .NET Core SDK (August 2026)

high Nessus Plugin ID 334621

Synopsis

The Microsoft .NET Core SDK installations on the remote host are affected by an elevation of privileges vulnerability.

Description

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

- .NET Elevation of Privilege Vulnerability (CVE-2026-58641, CVE-2026-62871, CVE-2026-62886, CVE-2026-62909)

- .NET Security Feature Bypass Vulnerability (CVE-2026-62899)

- .NET Information Disclosure Vulnerability (CVE-2026-62900, CVE-2026-62902)

- .NET Denial of Service Vulnerability (CVE-2026-62901)

- .NET Core Remote Code Execution Vulnerability (CVE-2026-70354)

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

Solution

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

Plugin Details

Severity: High

ID: 334621

File Name: smb_nt_ms26_aug_dotnet_core_sdk.nasl

Version: 1.1

Type: Local

Agent: windows

Family: Windows

Published: 8/11/2026

Updated: 8/11/2026

Configuration: Enable paranoid mode

Supported Sensors: Nessus Agent, Nessus

Risk Information

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-62902

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

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

CVSS Score Source: CVE-2026-70354

Vulnerability Information

CPE: cpe:/a:microsoft:.net_core

Required KB Items: Settings/ParanoidReport, installed_sw/.NET Core SDK Windows

Exploit Ease: No known exploits are available

Patch Publication Date: 8/11/2026

Vulnerability Publication Date: 8/11/2026

Reference Information

CVE: CVE-2026-58641, CVE-2026-62871, CVE-2026-62886, CVE-2026-62897, CVE-2026-62898, CVE-2026-62899, CVE-2026-62900, CVE-2026-62901, CVE-2026-62902, CVE-2026-62909, CVE-2026-70354

Detections

Analytics