Security Updates for Microsoft .NET Framework (July 2026)

high Nessus Plugin ID 329339

Synopsis

The Microsoft .NET Framework installation on the remote host is affected by multiple vulnerabilities.

Description

The Microsoft .NET Framework installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities:

- Allocation of resources without limits or throttling in .NET allows an unauthorized attacker to deny service over a network. (CVE-2026-47302)

- Stack-based buffer overflow in .NET Framework allows an unauthorized attacker to deny service over a network. (CVE-2026-50527)

- Protection mechanism failure in .NET Framework allows an unauthorized attacker to execute code locally.
(CVE-2026-50646)

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

Solution

Microsoft has released the following security updates to address this issue:
-KB5099535
-KB5100984
-KB5100985
-KB5100989
-KB5100990
-KB5100991
-KB5100998
-KB5101000
-KB5101001
-KB5101002
-KB5101003
-KB5101004
-KB5101005
-KB5101006
-KB5101007
-KB5101008
-KB5101009
-KB5101010
-KB5101011
-KB5101014

Plugin Details

Severity: High

ID: 329339

File Name: smb_nt_ms26_jul_dotnet.nasl

Version: 1.1

Type: Local

Agent: windows

Family: Windows : Microsoft Bulletins

Published: 7/24/2026

Updated: 7/24/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 94.07

CVSS v2

Risk Factor: High

Base Score: 7.2

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

CVSS Score Source: CVE-2026-50646

CVSS v3

Risk Factor: High

Base Score: 7.8

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

Vulnerability Information

CPE: cpe:/a:microsoft:.net_framework

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Patch Publication Date: 7/14/2026

Vulnerability Publication Date: 7/14/2026

Reference Information

CVE: CVE-2026-47302, CVE-2026-47304, CVE-2026-50304, CVE-2026-50324, CVE-2026-50355, CVE-2026-50368, CVE-2026-50411, CVE-2026-50525, CVE-2026-50527, CVE-2026-50646, CVE-2026-50647, CVE-2026-50648, CVE-2026-50649, CVE-2026-50650, CVE-2026-50652, CVE-2026-50653, CVE-2026-50659, CVE-2026-56158

CWE: 116, 121, 345, 347, 400, 502, 693, 770, 835, 94

IAVA: 2026-A-0718

MSFT: MS26-5099535, MS26-5100984, MS26-5100985, MS26-5100989, MS26-5100990, MS26-5100991, MS26-5100998, MS26-5101000, MS26-5101001, MS26-5101002, MS26-5101003, MS26-5101004, MS26-5101005, MS26-5101006, MS26-5101007, MS26-5101008, MS26-5101009, MS26-5101010, MS26-5101011, MS26-5101014

MSKB: 5099535, 5100984, 5100985, 5100989, 5100990, 5100991, 5100998, 5101000, 5101001, 5101002, 5101003, 5101004, 5101005, 5101006, 5101007, 5101008, 5101009, 5101010, 5101011, 5101014

Detections

Analytics