Microsoft PowerShell 7.4.x < 7.4.14 / 7.5.x < 7.5.5 Security Feature Bypass (April 2026)

high Nessus Plugin ID 306442

Synopsis

The Windows app installed on the remote host is affected by a security feature bypass vulnerability.

Description

The Windows 'Microsoft PowerShell' app installed on the remote host is 7.4.x prior to 7.4.14 or 7.5.x prior to 7.5.5. It is, therefore, affected by a security feature bypass vulnerability:

- Improper input validation in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally. (CVE-2026-26143)

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

Solution

Upgrade to Microsoft PowerShell version 7.4.14, 7.5.5, or later via the Microsoft Store.

Plugin Details

Severity: High

ID: 306442

File Name: smb_nt_ms26_apr_powershell.nasl

Version: 1.1

Type: Local

Agent: windows

Family: Windows : Microsoft Bulletins

Published: 4/14/2026

Updated: 4/14/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

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-2026-26143

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:powershell

Required KB Items: SMB/Registry/Enumerated, WMI/Windows App Store/Enumerated

Patch Publication Date: 4/14/2026

Vulnerability Publication Date: 4/14/2026

Reference Information

CVE: CVE-2026-26143

Detections

Analytics