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Vulnerabilities CVE-2026-73250

CVE-2026-73250

Medium
Open
TLP:CLEAR

Notepad++: Install-time PowerShell command injection through installation path

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Description

Notepad++ is a free and open-source source code editor. Prior to 8.9.7, the Notepad++ Windows 11 x64 and ARM64 installer passes the attacker-influenced installation directory `$INSTDIR` from PowerEditor/installer/nppSetup.nsi into a PowerShell `-Command` string used by RegisterMSIX to invoke Add-AppxPackage, allowing PowerShell subexpression syntax such as `$()` in the installation path to execute commands in the installer's security context when the context menu component is selected. This issue is fixed in version 8.9.7.

Details

CVSS Score
5.4
EPSS Score
0.13%

2.9th percentile

CVSS Vector
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Confidence
90%
Published
Aug 11, 2026
Last Modified
Aug 11, 2026
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