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

high Nessus Plugin ID 320853

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Synopsis

The remote Windows host is affected by a .NET Core SDK vulnerability

Description

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.

Plugin Details

Severity: High

ID: 320853

File Name: smb_nt_ms26_jun_dotnet_core_sdk.nasl

Version: 1.2

Type: Local

Agent: windows

Family: Windows

Published: 6/12/2026

Updated: 6/15/2026

Configuration: Enable paranoid mode

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.02

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2026-45490

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

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

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: 6/9/2026

Vulnerability Publication Date: 6/9/2026

Reference Information

CVE: CVE-2026-45490

IAVA: 2026-A-0565

Detections

Analytics