Security Update for Microsoft .NET Core (October OOB 2026)

critical Nessus Plugin ID 372464

Synopsis

The Microsoft .NET Core installations on the remote host are affected by multiple vulnerabilities.

Description

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

- Out-of-bounds write in .NET allows an unauthorized attacker to execute code over a network.
(CVE-2026-70197)

- Out-of-bounds write in .NET allows an unauthorized attacker to elevate privileges over a network.
(CVE-2026-111497)

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: Critical

ID: 372464

File Name: smb_nt_ms26_oct_oob_dotnet_core.nasl

Version: 1.2

Type: Local

Agent: windows

Family: Windows

Published: 10/27/2026

Updated: 10/27/2026

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

Risk Information

VPR

Risk Factor: Critical

Score: 9.2

Percentile: 99.77

CVSS v2

Risk Factor: High

Base Score: 7.6

Temporal Score: 6.3

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

CVSS Score Source: CVE-2026-70197

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.5

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

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

CVSS v4

Risk Factor: Critical

Base Score: 9.2

Threat Score: 9.2

Threat Vector: CVSS:4.0/E:A

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS Score Source: CVE-2026-111497

Vulnerability Information

CPE: cpe:/a:microsoft:.net_core

Required KB Items: installed_sw/.NET Core Windows

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/25/2026

Vulnerability Publication Date: 10/25/2026

CISA Known Exploited Vulnerability Due Dates: 11/10/2026

Reference Information

CVE: CVE-2026-111497, CVE-2026-70197

CWE: 787

Detections

Analytics